Does COVID-19 lose its effectiveness over time and will it need to be given annually like the flu vaccine?

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Question: Does COVID-19 lose its effectiveness over time and will it need to be given annually like the flu vaccine?

Answer:. According to the Centers for Disease Control and Prevention (CDC), experts are still studying how long the vaccine-induced immunity lasts.

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Vaccines produced by Pfizer-BioNTech and Moderna have been approved by the FDA for emergency use. Both vaccines require the receipt of two doses, 21 days apart, to achieve a maximum efficacy of approximately 95%.

According to NBC News chief medical officer Dr. John Torres, vaccine-induced immunity is expected to last several years; however, more research is needed to determine the longevity of its effectiveness.

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