6-Year checkup: does the EV71 vaccine still shield kids?
NCT ID NCT07568522
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study follows up on 220 children who received the EV71 vaccine (Envacgen®) or a placebo about 6 years ago. Researchers will measure antibody levels in the blood to see if protection against enterovirus 71, which causes hand-foot-mouth disease, has lasted. The goal is to understand the vaccine's long-term effectiveness.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Inactivated EV71 enterovirus vaccine (Envacgen®) with adjuvant AlPO4
What this could lead to
If successful, this study could show that the EV71 vaccine provides long-lasting protection against hand-foot-mouth disease caused by enterovirus 71.
What could go wrong
This is an observational follow-up, not a new treatment test. It only measures antibody levels, not actual disease prevention, and results may not apply to all populations.
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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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.
Contacts and locations
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Locations
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Chang Gung Medical Hospital Linkou
Taoyuan, Taiwan
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Mackay Memorial Hospital, HsincChu
Hsinchu, Taiwan
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Mackay Memorial Hospital, Taipei
Taipei, Taiwan
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National Taiwan University Hospital
Taipei, Taiwan