Tiny study on vaccine response in heart transplant patients ends early
NCT ID NCT04845945
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study aimed to measure how well heart transplant candidates and recipients respond to standard pneumococcal vaccines using two blood tests. Only 4 people enrolled before the study was terminated. Because it was so small, it provides very limited information about vaccine effectiveness in this group.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
PCV15 and PPSV23 (pneumococcal vaccines)
What this could lead to
If successful, this could help doctors understand if standard pneumococcal vaccines work well in heart transplant patients.
What could go wrong
The study was terminated early with only 4 participants, so results are very limited and may not apply to others.
Disclaimer
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Montefiore Medical Center, Infectious Diseases
The Bronx, New York, 10467, United States