Duration of COVID Vaccine Immunity

COVID immunity, from vaccine or infection, doesn't last forever. A new study published in JAMA Network Open analyzes previous research to determine the duration of protection from vaccines.

The scientists, led by a team from Italy, analyzed 40 studies that documented people‚Äôs vaccination status and their subsequent infections with COVID-19, confirmed by lab tests. 

After one month of full vaccination, COVID vaccine effectiveness against symptoms was 53% overall, varying among vaccines. Effectiveness dropped to 14% after six months and 9% after nine months.

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