“Understanding how long the immunity lasts and understanding how long the protection lasts,” Willeford said. “The way we have to do that is we have to keep going back to that original group of 40,000 people in the Pfizer group and we have to go back and say ‘Hey do you still have protection against Covid-19?’
The Link LonkApril 05, 2021 at 10:15AM
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Health officials predict a vaccine booster could be needed after one year - WBRC
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