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

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Question: Does the COVID-19 vaccine lose its effectiveness over time and will it need to be taken annually as 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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The vaccines produced by Pfizer-BioNTech and Moderna have been approved by the FDA for emergency use authorization. Both vaccines require recipients to receive two doses, 21 days apart, to achieve maximum efficacy of around 95%.

According to NBC News senior medical correspondent, Dr. John Torres, the vaccine-induced immunity is expected to last for a few years; however, more research must be done to determine the longevity of its effectiveness.

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