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U.S. cases involving Brazil variant on the rise, according to CDC data

covid-19 patients are treated in the municipal hospital of Sao Joao de Meriti in Brazil's Rio de Janeiro state on Thursday. The more virulent P.1 variant that first emerged in Brazil is also gaining ground in the United States. (Felipe Dana/AP)
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As new U.S. coronavirus cases trend upward — with nearly 80,000 new infections reported Thursday — health officials are warning about the spread of multiple, more transmissible variants, some of which have seeded outbreaks in states such as Michigan and California.

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On Thursday, the U.S. Centers for Disease Control and Prevention released new data on emerging variants, including those first identified in Brazil, Britain and South Africa. The B.1.1.7 variant initially detected in Britain accounts for almost 20,000 cases in all 50 states — and has become the dominant strain, officials say.

For the first time, however, the P.1 variant that originated in Brazil has taken the No. 2 spot. At least 434 people in the United States have been infected with the variant, which has devastated Brazil, with the largest number of cases found in Massachusetts, Illinois and Florida.

Here are some significant developments:

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