After COVID-19 Vaccination, Why Do Some People Run a Fever?

A study links post–COVID-19 vaccination fever to differences in the gut microbiome, suggesting microbiome features may be associated with who runs a fever.

• Why it matters: Fever after vaccination varies across individuals, but the biological basis for that variation is unclear.
• What they did: The study examined the gut microbiome in people after COVID-19 vaccination and tested whether microbiome differences tracked with fever occurrence.
• The result: The findings indicate the gut microbiome is associated with post-vaccination fever, which could help explain individual responses and guide future research.

AI summary of the abstract · may contain errors · not medical advice · read the paper.