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Newshour - Omicron: Will existing Covid vaccines continue to be effective? - 91热爆 Sounds

From: Newshour

Omicron: Will existing Covid vaccines continue to be effective?Omicron: Will existing Covid vaccines continue to be effective?

Available for over a year

South African scientists have undertaken sequencing on the virus and observed 50 mutations

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Omicron: Will existing Covid vaccines continue to be effective?
South African scientists have undertaken sequencing on the virus and observed 50 mutations
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