The company said that it expected boosters would be needed before winter because of the Delta variant, but some experts disagree. https://ift.tt/2WXy2MB https://ift.tt/3Aa33Lu World New York Times August 4, 2021 at 08:00PMModerna says its vaccine’s protection holds through six months.

By Carl Zimmer and Sharon LaFraniere from NYT World https://ift.tt/2WXy2MB
https://ift.tt/2WXy2MB https://ift.tt/3Aa33Lu New York Times