WASHINGTON, July 29 -- The U.S. Department of State issued the following foreign press center briefing on July 28, 2021, by Shane Crotty, professor at the La Jolla Institute for Immunology, entitled "COVID-19 Vaccine Immunity and the Impact of Variants":

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MODERATOR: Good afternoon and welcome to the Washington Foreign Press Center briefing on COVID-19 vaccine immunity and the impact of variants. My name is Jen McAndrew, and I am today's moderator.