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Vaccine-related harms

Vaccines can cause injuries, including rare serious events such as myocarditis, thrombosis, and injection-site reactions

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Jan 16, 2026
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What rare adverse events have been causally linked to MMR and how frequently do they occur?

The MMR vaccine has a well-established safety profile: common reactions are mild and transient (fever, rash, injection-site pain), while a small set of rare serious events have been causally linked to...