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We haven't solved why some people experience severe reactions to vaccines while most don't.

open Global / Unspecified, Global WS00546
Vaccines are safe and effective for the vast majority of people, but a small number experience severe reactions for reasons not yet fully understood. Better prediction of who's at risk could make vaccination even safer.
Category: Health Biology
Created at: 2026-07-21T15:42:00Z
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WS00546 | World Solve | https://worldsolve.org/index.php?view=problem&id=546

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