Associated Press
Publicado em 31/12/2020 às 00:19:31EXPLAINER: Scientists trying to understand new virus variant
2020-12-30 18:43:33FILE - In this Nov. 24, 2020, file photo, registered nurse Chrissie Burkhiser works in the emergency room at Scotland County Hospital in Memphis, Mo. Scientists say there is reason for concern but not alarm about new strains of the co...
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