As first Omi­cron case in US crops up, re­searchers won­der: Which an­ti­bod­ies, vac­cines will hold up?

As Covid-19 drug and vac­cine de­vel­op­ers race to fig­ure out which of their prod­ucts might be ham­pered by the new vari­ant, the CDC on Wednes­day af­ter­noon an­nounced the first con­firmed case of the Omi­cron vari­ant (B.1.1.529) in the US, found in San Fran­cis­co.

The uniden­ti­fied in­di­vid­ual was a trav­el­er who re­turned from South Africa on Nov. 22, 2021, was ful­ly vac­ci­nat­ed, and had mild symp­toms that the CDC de­scribed as im­prov­ing. All close con­tacts have been con­tact­ed and have test­ed neg­a­tive, the cen­ters said.

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