RIO DE JANEIRO, BRAZIL - A survey conducted by Hemorio found that 28 percent of people who donated blood during the Covid-19 pandemic had contact with the novel coronavirus. The result refers to people who had symptoms of the disease as well as to asymptomatic people.

In all, 7,286 blood donations were analyzed between April and June. During this period, the number of infections increased sharply.

By the second half of April, only four percent of donors had contracted Covid-19. By early May, the number had jumped to 18 percent. By early June, the study showed that 28 . . .

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