Reinfections appear more common with Omicron, South African scientists say.
By BY LYNSEY CHUTEL from NYT World https://ift.tt/31r1hJH
By BY LYNSEY CHUTEL from NYT World https://ift.tt/31r1hJH
By BY LYNSEY CHUTEL from NYT World https://ift.tt/31r1hJH
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