"With all of the vaccines that you have, over a period of time…different viruses and different vaccines have variable degrees of durability of protection," Dr. Fauci says on a reason for a second booster. "It doesn't last an indefinite period of time."https://t.co/OvJ5kF2Br1
— MSNBC (@MSNBC) March 31, 2022
Source: Twitter
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