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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 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 The study has yet to be published in a scientific journal and has not been peer reviewed.
These co-infections can generate combinations and generate new variants even more quickly than has been happening.”
Brazilian health regulator Anvisa said data on the Covid-19 vaccine developed by AstraZeneca Plc and Oxford University so far shows that it is safe for elderly patients, after Germany recommended it be given only to those aged under 65.
Anvisa added in a statement, however, that it is not possible to determine the efficacy of the vaccine, called Covidshield, for a population over the age of 65 because the participation of elderly people in the studies conducted so far was not statistically relevant.