Moderna's zika vaccine shows promise in phase 2 trial
NCT ID NCT04917861
First seen Oct 31, 2025 · Last updated Jun 19, 2026 · Updated 35 times
Summary
This study tested an experimental Zika vaccine (mRNA-1893) in 808 healthy adults aged 18 to 65. The goal was to check if the vaccine is safe and triggers a strong immune response. Participants received either the vaccine or a placebo, and researchers monitored side effects and antibody levels.
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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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Contacts and locations
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Locations
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Benchmark Research - Fort Worth
Fort Worth, Texas, 76135, United States
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Carribean Medical Research
San Juan, PR, 00918, Puerto Rico
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Clinical Research Puerto Rico, Inc.
Guayama, PR, 00784, Puerto Rico
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Clinical Research Puerto Rico, Inc.
San Juan, PR, 00909, Puerto Rico
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GCM Medical Group, PSC
San Juan, PR, 00917, Puerto Rico
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Johnson County Clin-Trials
Lenexa, Kansas, 66219, United States
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Latin Clinical Trial Center, Inc.
San Juan, PR, 00909, Puerto Rico
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Meridian Clinical Research (Sioux City, IA)
Sioux City, Iowa, 51106, United States
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Ponce Medical School Foundation, Inc.
Ponce, PR, 00713, Puerto Rico
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Ponce Medical School Foundation, Inc.
Ponce, PR, 00716, Puerto Rico
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University of Puerto Rico
San Juan, PR, 00935, Puerto Rico
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.