What question did this study set out to answer?

To evaluate the incidence of prespecified serious adverse events following COVID-19 mRNA vaccination across defined postvaccination time windows.

September 3, 2021JAMAOpen Access

Surveillance for Adverse Events After COVID-19 mRNA Vaccination

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Authors

NKNicola P. KleinKaiser Permanente NLNed LewisIntermountain Healthcare KGKristin GoddardUniversity of North Carolina at Chapel Hill

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Implication

Surveillance study finds no significant increase in serious adverse outcomes in vaccinated individuals, indicating a reassuring initial safety profile.

Key Points

To evaluate the incidence of prespecified serious adverse events following COVID-19 mRNA vaccination across defined postvaccination time windows.
Conducted an interim safety surveillance analysis of individuals receiving COVID-19 mRNA vaccines.
Compared the incidence of selected serious adverse outcomes during a primary risk window (1 to 21 days postvaccination) against a comparison window (22 to 42 days postvaccination).
Incidence of selected serious adverse outcomes was not significantly higher in the 1 to 21 days postvaccination window compared with the 22 to 42 days postvaccination window.
Confidence intervals for many evaluated outcomes remained wide due to interim sample constraints, with active surveillance ongoing.

Cite This Study

Klein et al. (2021) studied this question.

synapsesocial.com/papers/69dff6a4bdd89ea53186078f https://doi.org/10.1001/jama.2021.15072

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Implication

Surveillance study finds no significant increase in serious adverse outcomes in vaccinated individuals, indicating a reassuring initial safety profile.

Surveillance for Adverse Events After COVID-19 mRNA Vaccination

Discussion

Member takes

Implication

Key Points

Cite This Study

Surveillance for Adverse Events After COVID-19 mRNA Vaccination

Discussion

Member takes

Implication

Key Points

Cite This Study

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