RIO DE JANEIRO, BRAZIL - Researchers in southern Brazil said they have discovered patients infected with two different strains of the new coronavirus simultaneously, reflecting concerns about the growing number of variants in the country.
The researchers, who posted their findings Wednesday on medical website medRxiv, said their study would be the first in the world to confirm co-infection with two strains of the coronavirus. The study has yet to be published in a scientific journal and has not been peer reviewed.
The patients, both in their 30s, were infected in late November with the P.2 variant of coronavirus . . .