Pfizer says vaccine protection lasts at least 6 months after second shot

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Makers own research offers a fresh look at how long protection from the coronavirus might last. CBS is Kamiya McCormick. A lot of researchers are looking into how long these vaccines protect us and whether we'll need booster shots. Advisor said this morning, it's vaccine is more than 91% effective for at least six months. The company has been studying thousands of fully vaccinated people in the months after they got their second shots. The company says its vaccine also proved to be very effective against the variant. First detective in South Africa variants have been another concern of health experts.

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