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Brazilian study suggests increased risk of reinfection by Delta variant

RIO DE JANEIRO, BRAZIL - According to researchers, the serum of people previously infected by other strains of the disease is less potent against this viral variant.

The Delta variant of the novel coronavirus increases the risk of reinfection by Covid-19, according to a recently published study conducted by the Oswaldo Cruz Foundation (Fiocruz).

On Monday, the foundation provided further details on its research on the Delta variant, initially detected in India . . .

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