Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen
Biologic
Still being tested
✓Identity checked
Sources last checked 2026-09-04
This page shows what was measured, who it was measured in, and what that does not settle.
What Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen does in the body
RNAWiki has not recorded what this substance changes in the body.
What happened in people
RNAWiki has not yet published a reviewed conclusion for this use.
§ A fixed RNAWiki sentence
Where this came from
Wording RNAWiki always uses, not a finding about this substance.
No reviewed claim names a result for any goal on this record.
No source is stored against this line.
The limit that matters most
Not recorded.
Where it acts
Not recorded.
Kind of result
No result is published, so no kind of result applies yet
Supervision
Professional supervision is normally required. It is a prescription or clinician-administered medicine where it is approved.
What the registries record it as
The substance registry classes this as structurallydiverse.
FDA substance registry · 9W2T4OSF98 · read 2026-08-29
It is recorded as coming from STREPTOCOCCUS PNEUMONIAE SEROTYPE 19A WHOLE. The part recorded is bacterial capsule.
FDA substance registry · 9W2T4OSF98 · read 2026-08-29
Where each sentence above came from
No plain explanation of what this changes is stored.
No recorded use is stored in reader language.
No statement of the main limit is recorded.
The four opening statements run to 26 words.
Words this page uses
Four words worth knowing first
Chosen from what this page shows, with each one explained before the word it depends on.
Biomarker
A biomarker is a number from a test that stands in for something about health.
A picture of it, and where the picture fails
A biomarker is like a fuel gauge.
Where that stops being true. A gauge is wired to the tank. Many biomarkers are only loosely tied to health.
What people get wrong. A better number is read as a better life. Several medicines improved a number and helped nobody.
A measurable indicator used as a substitute for a clinical outcome of interest.
Stand-in result
A stand-in result is a number measured because the real result takes too long.
A picture of it, and where the picture fails
It is like judging a journey by the speedometer rather than by arriving.
Where that stops being true. Speed does predict arrival. Many stand-in results do not predict the real one.
What people get wrong. A stand-in result is often reported as the result itself.
A surrogate endpoint substituted for a clinical endpoint, valid only where the substitution has been shown to hold.
What happened in people◇Read from sources, not yet reviewed
What happened in people
Each card is one study: the exact question it asked, who was in it, and whether it showed what it set out to show.
Groups 1 and 2: Geometric Mean Titers (GMTs) Against Meningococcal Serogroups A, C, W, and Y
✗ The study did not show it
Who was studied
NCT03547271
How many people
1660
Study design
Phase 3
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated
What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.
The limits of this study, and where it came from
Main limit. No limitation is recorded for this study.
How far it carries. This study is recorded from the curated record, not from the registry match.
Form and route.
Interval reported. Not recorded in this summary
Written into the record, not signed off as a reviewed claim.
openFDA NDC Directory · a recorded source, not a stored snapshot
PubChem PUG-REST · a recorded source, not a stored snapshot
openFDA Drugs@FDA · a recorded source, not a stored snapshot
Europe PMC · a recorded source, not a stored snapshot
To evaluate the immunogenicity after vaccination
✗ The study did not show it
Who was studied
NCT07035054
How many people
992
Study design
Phase 2
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated
What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.
The limits of this study, and where it came from
Main limit. No limitation is recorded for this study.
How far it carries. This study is recorded from the curated record, not from the registry match.
Form and route.
Interval reported. Not recorded in this summary
Written into the record, not signed off as a reviewed claim.
openFDA NDC Directory · a recorded source, not a stored snapshot
PubChem PUG-REST · a recorded source, not a stored snapshot
openFDA Drugs@FDA · a recorded source, not a stored snapshot
Europe PMC · a recorded source, not a stored snapshot
Immune Response to the Licensed Pediatric DTaP-Hib-IPV-HepB Vaccine Co-administered With a 2-dose Regimen of HIL-214 at 4 and 6 Months of Age, Compared to That of the Routine Pediatric Vaccines Co-administered With Placebo.
✗ The study did not show it
Who was studied
NCT05836012
How many people
329
Study design
Phase 2/Phase 3
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated
What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.
The limits of this study, and where it came from
Main limit. No limitation is recorded for this study.
How far it carries. This study is recorded from the curated record, not from the registry match.
Form and route.
Interval reported. Not recorded in this summary
Written into the record, not signed off as a reviewed claim.
openFDA NDC Directory · a recorded source, not a stored snapshot
PubChem PUG-REST · a recorded source, not a stored snapshot
openFDA Drugs@FDA · a recorded source, not a stored snapshot
Europe PMC · a recorded source, not a stored snapshot
What we know
RNAWiki holds 3 written-up human studies for this substance, each with the question it asked.
How we know it
Each card names the study, the number of people and what the study set out to measure.
What this does not prove
These summaries were written by a person and have not been signed off as reviewed claims.
Why it matters
A study that failed is as informative as one that worked, and both are here.
What we still do not know
No reviewed claim exists, so no exact population, effect size or interval is published yet.
What happened in people◇Read from sources, not yet reviewed
How close this is to real life
The top step is something a person would feel or care about. The bottom is a guess from software. Filled steps are where evidence exists for this substance.
□Living longer, or avoiding a major eventNo evidence recorded. Death, a heart attack, a stroke, a hospital stay.No registered study measures this.
□What a body can do day to dayNo evidence recorded. Walking, dressing, breathing, recovering.No registered study measures this.
□Measured performanceNo evidence recorded. How much was lifted, how far was run, how fast.No registered study measures this.
□Symptoms and quality of lifeNo evidence recorded. Pain, tiredness, mood, sleep, as the person rated it.No registered study measures this.
■A number that stands in for healthEvidence recorded. Cholesterol, blood sugar, bone density. A stand-in, not the thing itself.2 registered measures of this kind.
■A step measured inside a personEvidence recorded. Something measured in human tissue or human cells.A human record sits on the stored organism ladder.
□AnimalsNo evidence recorded. Mice, rats, dogs. Useful for ideas, not proof about people.No animal record is stored.
□Cells in a dishNo evidence recorded. Cells or chemistry on a bench, far from a whole body.No cell or bench record is stored.
□A guess from softwareNo evidence recorded. Nobody measured it. RNAWiki never publishes one as a finding.RNAWiki stores no prediction for this record. Software can suggest a link. RNAWiki does not publish one as a finding.
Higher on these steps means closer to something a person would feel. It does not mean better done.
What it would be like to take◇Read from sources, not yet reviewed
Felt, measured, or meaningful
Three different things that get called the same word. Registered studies measured all three, and mixing them is how a blood test becomes a health claim.
Felt
Things a person could notice without a test.
No registered study measured anything of this kind.
Measured
Things only a test, a scale or a device shows.
anti phtd antibody concentration
collection of human plasma for conversion into serum
Meaningful
Things that change how a life goes, not only a number.
No registered study measured anything of this kind.
A registered study says what someone planned to measure. It does not say what they found. A number moving is not the same as a life going better. The two are shown apart here.
Felt, but not shown to help. A person notices a change. No study showed it leads anywhere good.
Measured, but not felt. A number moves. The person notices nothing. Both can be true.
Measured, but not shown to matter. A number moves in the good direction. Nobody showed that lives went better.
Matters, but takes years. The result that counts may take longer than anyone would keep watching.
Names that fit none of the three (38)
response rate to 11 vaccine serotypes
occurrence of all serious adverse events
immunoglobulin levels
igg levels
immunoglobulin m levels
igm levels
opsonophagocytic killing activity
who achieve an antibody response
an adverse event
a serious adverse event
a vaccine related serious adverse event
elevated body temperature
reporting serious adverse experiences
radiologically confirmed all cause pneumonia
acute respiratory disease
an injection site adverse event
a systemic adverse event
who discontinued vaccination due to an adverse event
geometric mean increases in pneumococcal antibody titer
typhim vi response specific anti vi igg as measured by elisa
These are harms, study-process measures, or names the rules did not recognise. They are shown rather than dropped.
What is missing or unclear◇Read from sources, not yet reviewed
Were people like you studied?
RNAWiki cannot tell whether a study fits you. It can show who was in it, and where the result stops carrying.
Who was studied
No description of who was studied is recorded.
Who is missing from the studies
Which groups were under-represented in the studies has not been recorded for this substance. Pregnancy, breastfeeding, children, older adults, and people with liver or kidney conditions are commonly excluded from trials; nothing here says whether they were.
Where the result stopped carrying
This is a scope explorer, not a diagnosis engine.
It shows who was studied so you can see whether people similar to you were included.
RNAWiki cannot tell whether a study fits you. It can show who was in it.
What it would be like to take◇Read from sources, not yet reviewed
Why it might seem to do nothing
A real effect and a noticed effect are different things. These are the recorded reasons the two come apart.
It was studied for a different goal
The studies measured something else entirely.
On this record: Some registered studies measured things that match no goal on this page.
It was studied in different people
The people in the studies were not much like the reader.
On this record: Which groups were under-represented in the studies has not been recorded for this substance. Pregnancy, breastfeeding, children, older adults, and people with liver or kidney conditions are commonly excluded from trials; nothing here says whether they were.
The evidence may simply be wrong
Small early studies often do not hold up.
On this record: RNAWiki has not yet published a reviewed conclusion for this use.
Other reasons RNAWiki checked and found nothing for (10)
A different form was studied
The studied form is not the form on the shelf. Nothing in this record points to this reason.
There was nothing to correct
Where a level is already normal, topping it up may change nothing. Nothing in this record points to this reason.
Something else had to happen too
In the studies it was paired with training, a diet or another treatment. Nothing in this record points to this reason.
The change is too small to feel
A real change can still sit below what a person notices. Nothing in this record points to this reason.
Day-to-day swing hides it
Sleep, food, stress and time of day move most numbers more than this would. Nothing in this record points to this reason.
Not enough time yet
The studies ran longer than the person has waited. Nothing in this record points to this reason.
It was not taken as studied
Missed days change the result, and studies count them. Nothing in this record points to this reason.
Something else changed at the same time
Two changes at once cannot be told apart afterwards. Nothing in this record points to this reason.
The product may not be what it says
Contents of a sold product are not always what the label states. Nothing in this record points to this reason.
No recorded reason
RNAWiki has nothing stored that would explain it. Nothing in this record points to this reason.
None of these is a reason to take more. Taking more is not a step this page ever suggests.
What it would be like to take◇Read from sources, not yet reviewed
What taking it involves
The recorded facts about getting hold of it and using it. Nothing here is a suggestion about what you should do.
How it is supplied
Still being tested
❝ Quoted from a source
Where this came from
Copied from a source RNAWiki stored, with the source named.
Read from the recorded approval status.
No source is stored against this line.
Form and route
Not recorded.
∅ Nothing recorded
Where this came from
RNAWiki holds nothing here and says so rather than guessing.
No form or route is recorded.
No source is stored against this line.
Who oversees it
Professional supervision is normally required. It is a prescription or clinician-administered medicine where it is approved.
❝ Quoted from a source
Where this came from
Copied from a source RNAWiki stored, with the source named.
The identity record classes it as investigational; no register records an approval.
No source is stored against this line.
What is in the pack
Not recorded.
∅ Nothing recorded
Where this came from
RNAWiki holds nothing here and says so rather than guessing.
Nothing is recorded about product quality.
No source is stored against this line.
Where it is registered
Regulatory records are listed in the technical disclosure at the foot of this page.
# Counted from records
Where this came from
A count of rows RNAWiki holds. It describes our records, not your body.
Register entries are stored per jurisdiction and shown with their dates.
No source is stored against this line.
Why people stop
Not recorded.
∅ Nothing recorded
Where this came from
RNAWiki holds nothing here and says so rather than guessing.
No record of why people stopped taking it is stored for this substance.
No source is stored against this line.
What it would be like to take∅Nothing found in the sources checked
What can go wrong
Sorted by where each line came from. A regulator's label and a report somebody sent in are not the same kind of fact.
∅Nothing found in the sources checked
No harm is recorded against this substance in the sources RNAWiki checked. Finding nothing is not the same as showing there is nothing.
The sources listed were searched and held nothing. That is not the same as nothing existing.
Over a long time. No completed tested study window is recorded, so long-term effects are not established by the registry record.
Groups the studies covered thinly. Which groups were under-represented in the studies has not been recorded for this substance. Pregnancy, breastfeeding, children, older adults, and people with liver or kidney conditions are commonly excluded from trials; nothing here says whether they were.
What is missing or unclear◇Read from sources, not yet reviewed
Does the exact form matter?
Evidence belongs to the exact thing that was tested. A different salt, a different mixture or a different preparation is a different question.
The form that was studied
Not recorded.
∅ Nothing recorded
Where this came from
RNAWiki holds nothing here and says so rather than guessing.
The exact form studied is not recorded.
No source is stored against this line.
What is sold
Not recorded.
∅ Nothing recorded
Where this came from
RNAWiki holds nothing here and says so rather than guessing.
Nothing further is recorded about which forms are sold.
No source is stored against this line.
What is recorded as being sold
4 products list this as an active ingredient in the United States drug directory. None of them contains it on its own, so nothing on this page can separate it from what it is combined with.
FDA National Drug Code directory · 0006-4943 · read 2026-08-29
They are sold as injection, solution, taken intramuscular and subcutaneous.
FDA National Drug Code directory · 0006-4943 · read 2026-08-29
Evidence carries across two names for one substance. It does not carry across a salt, a mirror form or a mixture.
What it would be like to take◇Read from sources, not yet reviewed
What you could measure
This one is decided with a clinician, so this section holds questions to ask rather than a plan to run.
Self-experiment planning is not offered for a prescription or clinician-supervised medicine, investigational agent. The questions below are for a clinician or pharmacist.
Questions worth asking
Which of the trials of Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen studied people like me?
What was measured, and for how long?
Was the result a laboratory value or a health outcome?
What would we watch for, and when would we stop?
Tracking can show whether something changed for you. It cannot show what caused it.
RNAWiki records evidence. It does not say whether this substance is right for you.
What is missing or unclear◇Read from sources, not yet reviewed
What nobody knows yet
Open questions, each with why it is open and what would close it.
How much did people take in the studies?
The sources RNAWiki checked hold nothing for this field.
Why it matters. A result belongs to an amount. Without the amount the result floats free.
What would answer it
A stored source that records it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
How fast does the body clear it?
The sources RNAWiki checked hold nothing for this field.
Why it matters. Without this, nothing on this page can say how long anything lasts.
What would answer it
A stored source that records it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
Missing populations
Which groups were under-represented in the studies has not been recorded.
Why it matters. Recorded by the evidence model as a gap on this record.
What would answer it
A study that measures it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
Missing long-term data
No completed tested study window is recorded.
Why it matters. Recorded by the evidence model as a gap on this record.
What would answer it
A study that measures it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
No reviewed conclusion
RNAWiki has not yet published a reviewed conclusion for this use.
Why it matters. Recorded by the evidence model as a gap on this record.
What would answer it
A study that measures it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
Missing interaction studies
No interaction was found in the registers checked. Not finding one is not the same as showing there is none.
Why it matters. Recorded by the evidence model as a gap on this record.
What would answer it
A study that measures it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
Formulation uncertainty
Several salts, forms or products of Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen are recorded. Results from one form may not transfer to another.
Why it matters. Recorded by the evidence model as a gap on this record.
What would answer it
A study that measures it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
Mechanism not reviewed
No reviewed mechanism story exists for this substance.
Why it matters. Recorded by the evidence model as a gap on this record.
What would answer it
A study that measures it, and a reviewer to sign it off.
Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.
What happened in people◇Read from sources, not yet reviewed
Check any of this yourself
Every line above traced back to the study it came from. This is the technical layer, and the vocabulary changes here.
Where else this substance is registered
FDA substance identifier (UNII)
9W2T4OSF98
DrugBank
DB10337
Checks this page had to pass
✓ Passed
Identity resolved
no open identity hold
✓ Passed
No unresolved merge across substance families
no quarantine open
✗ Not passed
Every public sentence names a source
The opening statement carries no source: the record holds neither an explanation nor a recorded use.
✗ Not passed
Trial roles classified for highlighted evidence
No registered study is classified as testing this substance.
✓ Passed
No internal keys in reader text
enforced by the copy-contract test over the rendered page
✓ Passed
Safety mode resolved
The identity record classes it as investigational; no register records an approval.
✓ Passed
Canonical metadata present
slug and display name present
What is missing or unclear◇Read from sources, not yet reviewed
How this medicine reached us
Kept near the foot of the page. A historical event moves up only when it changes something about this substance today.
What the approval register records
The earliest marketing start date recorded for a listed product is 19830707.
FDA National Drug Code directory · 0006-4943 · read 2026-08-29
What is missing or unclear◇Read from sources, not yet reviewed
What to learn next
Ordered by what would most change how you read this page, starting with what is easiest to misunderstand.
This order is fixed in code and does not count clicks or time on the page.
What is not here
7 questions this page could not answer
These sections were prepared and left out because there was nothing to put in them. They are listed rather than hidden, so the gaps in this record are visible.
What was measured, goal by goal — found nothing in the sources checked.
The path through the body — found nothing in the sources checked.
How long anything takes — found nothing in the sources checked.
What it may clash with — found nothing in the sources checked.
Other ways to the same goal — found nothing in the sources checked.
Claims that go past the evidence — found nothing in the sources checked.
What changed on this page — found nothing in the sources checked.
The record as stored
The full record, for auditing
Everything above is built from what is below. This layer keeps the technical vocabulary, record identifiers and every stored row, so a reader who wants to check the page can.
Recorded evidence blocks (8)
Q1
What did Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's largest trial (152723 people) and its longest (16 years) measure?
152723 people in Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's largest registered study, 16 years in its longest registered window, measuring Anti- PhtD antibody concentration. ClinicalTrials.gov · 2026-09-01
21 phase3, 15 phase2, 11 phase1, 8 phase4, 2 early phase1, 1 na, 1 na or unstated; NCT01351896; 2027-05-06. Last human test completed 2025, NCT06177912.
These counts include studies where Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen was a comparison treatment, a background treatment or an exposure in an observational study, and the longest window may be a planned end date. Trial roles have not yet been classified for this record.
Show the evidence
phase3
21
phase2
15
phase1
11
phase4
8
early phase1
2
na
1
2 more recorded rows
na or unstated
1
Last recorded human testNCT06177912
2025-02-26
recorded 2026-09-01 · last checked 2026-09-04
Q2
Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen was tested only in human — what did it show?
Interpretation Anti- PhtD antibody concentration — the recorded outcome words.
Show the evidence
humanNCT00307528
biomarker; Anti- PhtD antibody concentration; 54
recorded 2026-09-01 · last checked 2026-09-04
Q3
Why did Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's trial NCT00785967 stop?
1 recorded trial of Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen stopped. ClinicalTrials.gov · 2026-09-01
"Unexpected and severe difficulties in recruitment."; 1 of 54 registered studies
Show the evidence
TrialNCT00785967
withdrawn; "Unexpected and severe difficulties in recruitment."
recorded 2026-09-01 · last checked 2026-09-04
Q4
Could one person measure Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's effect on response rate to 11 vaccine serotypes?
Response rate to 11 vaccine serotypes: measured in Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's trials.
response rate to 11 vaccine serotypes is the recorded endpoint.
Show the evidence
biomarkers
response rate to 11 vaccine serotypes; 2026-09-01
occurrence of all serious adverse events; 2026-09-01
anti phtd antibody concentration; 2026-09-01
immunoglobulin levels; 2026-09-01
igg levels; 2026-09-01
immunoglobulin m levels; 2026-09-01
14 more recorded rows
biomarkers
igm levels; 2026-09-01
biomarkers
opsonophagocytic killing activity; 2026-09-01
biomarkers
who achieve an antibody response; 2026-09-01
biomarkers
an adverse event; 2026-09-01
biomarkers
a serious adverse event; 2026-09-01
biomarkers
a vaccine related serious adverse event; 2026-09-01
biomarkers
elevated body temperature; 2026-09-01
biomarkers
reporting serious adverse experiences; 2026-09-01
biomarkers
collection of human plasma for conversion into serum; 2026-09-01
biomarkers
radiologically confirmed all cause pneumonia; 2026-09-01
biomarkers
acute respiratory disease; 2026-09-01
biomarkers
an injection site adverse event; 2026-09-01
biomarkers
a systemic adverse event; 2026-09-01
biomarkers
who discontinued vaccination due to an adverse event; 2026-09-01
human trials at or under30
2
Not recorded for this substance
a recorded half-life
smallest human trial
0; NCT00785967; PHASE3; the smallest recorded human enrolment at or below 30; the registry states no direction of its result; WITHDRAWN
Q5
Which of a serious adverse event, a solicited injection site adverse event after vaccination 1 and a solicited systemic adverse event after vaccination 1 did Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's trials measure?
a serious adverse event, a solicited injection site adverse event after vaccination 1 and a solicited systemic adverse event after vaccination 1 lead 40 outcome terms across Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's trials. ClinicalTrials.gov · 2026-09-01
Interpretation immunoglobulin levels, igg levels, immunoglobulin m levels, igm levels, opsonophagocytic killing activity and who achieve an antibody response follow.
Show the evidence
response rate to 11 vaccine serotypes
1
occurrence of all serious adverse events
1
anti phtd antibody concentration
1
immunoglobulin levels
1
igg levels
1
immunoglobulin m levels
1
14 more recorded rows
igm levels
1
opsonophagocytic killing activity
1
who achieve an antibody response
1
an adverse event
1
a serious adverse event
1
a vaccine related serious adverse event
1
elevated body temperature
1
reporting serious adverse experiences
1
collection of human plasma for conversion into serum
1
radiologically confirmed all cause pneumonia
1
acute respiratory disease
1
an injection site adverse event
1
a systemic adverse event
1
who discontinued vaccination due to an adverse event
1
recorded 2026-09-01 · last checked 2026-09-04
Q6
Which of Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's 5 ongoing trials reports first?
5 registered trials of Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen are open; earliest completion 2026-10-31. ClinicalTrials.gov · 2026-09-01
Proportion of Patients Who Achieve an Antibody Response; Geometric mean increases in pneumococcal antibody titer; latest 2036-11-15
Show the evidence
Trial
NCT01351896
"Lenalidomide and Vaccine Therapy in Treating Patients With Early-Stage Asymptomatic Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma"; n 49; "Proportion of Patients Who Achieve an Antibody Response"; 2027-05-06
NCT02232191
"Immunologic Response to Pneumococcal Polysaccharide Vaccine in Splenic Injury Patients"; n 75; "Geometric mean increases in pneumococcal antibody titer"; 2027-07
NCT05170399
"Vaccine Responses in Patients With B Cell Malignancies"; n 350; "Serologic response against each administered vaccine following completion of the vaccine series in each study arm"; 2036-11-15
NCT05183854
"Pneumococcal Pneumonia Vaccine Series (PCV20 and PPSV23) in Patients With Chronic Lymphocytic Leukemia Associated Immunodeficiency, PROTECT CLL Trial"; n 61; "Proportion of patients who achieve the protocol defined change in antibody titers"; 2028-06
NCT05417165
"Anti-pneumococcal Vaccine Strategy in Patients With Chronic Lymphocytic Leukemia"; n 80; "Proportion of patients with anti-pneumococcal immunogenicity following early revaccination (1 year)"; 2026-10-31
recorded 2026-09-01 · last checked 2026-09-04
Q7
Which 16 trials of Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen posted no result?
Posted no result
16 of 16 completed trials
Registrations
NCT00169234, NCT00307008, NCT00307528, NCT00496093, NCT02079701 and NCT00493324, and 10 more
Completion dates
oldest 2005-02; newest 2024-08-30
Show the evidence
Trial
NCT00169234
2005-02
NCT00307008
2005-02
NCT00307528
2005-03-30
NCT00496093
2006-01
NCT02079701
2007-06
NCT00493324
2008-07
10 further recorded trials
NCT00170612
2008-08
NCT00479323
2008-08
NCT02097589
2014-09
NCT02072525
2015-06-02
NCT02429531
2018-08
NCT01239875
2019-07-17
NCT05163834
2022-03-08
NCT05346302
2022-12-21
NCT05667740
2023-10-08
NCT05982314
2024-08-30
Q8
At the median, Streptococcus Pneumoniae Type 19a Capsular Polysaccharide Antigen's trials enrolled 289.5 people — anything larger?
Median enrolment
289.5
Largest enrolment
152723
Registered trials counted
54
Where it is registeredIdentifiers, relations and other names
ClinicalTrials.gov — US Government work · Europe PMC — metadata only, under the recorded legal gate · derived from this page's own recorded fields; no external licence
✗ required summary fields resolved: 3 required field(s) not terminal: Best-supported result, Biggest unanswered question, Human evidence
✓ public claims reviewed: 0 reviewed claim(s); drafts are never rendered
✓ source coverage passed: 3 source rows
✓ no critical contamination: no quarantine open
✓ canonical metadata passed: slug and display name present
✓ no raw internal fields: enforced by the copy-contract test over the rendered page
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