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RIO DE JANEIRO, BRAZIL - Fiocruz infectologist Marcus Lacerda attends to at least 40 cases of Covid-19 in Manaus, capital city of the Brazilian Amazonas state, every day and is surprised that, unlike the first wave in early 2020, this time whole families have contracted the disease. He believes the emergence of a new strain of the coronavirus may be partly responsible.

The expert explains that the capital of Amazonas was severely affected last year due to its condensed profile, and by the pathogen's entry into the state through overseas flights at the start of the respiratory virus season . . .

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