However, whether this level translates into the functionality of the antibody is not known.

Booster doses may also counter waning immunity over a certain period.

For the most recent updates on COVID-19, visit ourcoronavirus news page.

COVID-19 vaccine booster shot

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Published online June 15, 2021. doi:10.7326/L21-0282

Centers for Disease Control and Prevention.When youve been fully vaccinated.

Food and Drug Administration.Antibody testing is not currently recommended to assess immunity after COVID-19 vaccination: FDA safety communication.

National Institutes of Health.NIH clinical trial evaluating mixed COVID-19 vaccine schedules begins.