Brazil

Undetected mutant variants of COVID should be on the rise in the United States, health officials say

Covid Mutations undermined optimism, even as more vaccines approach

The AstraZeneca COVID-19 vaccine applies for full regulatory approval in Brazil

What we know about all variants

COVID variant between triggers for severe outbreak in Manaus, Brazil

Researchers from Brazil find people infected with two different strains of coronavirus

South African Covid variant first detected in the US, South Carolina

Why vaccines may not be able to eliminate Covid-19: QuickTake

Why Brazilians are having to deal with the Covid crisis in their own hands – podcast | News

Number of COVID-19 deaths in the Americas reaches 1 million, hospitals overflowing, warns PAHO

Why some variants of the coronavirus are more contagious – and how we can prevent them

Johnson warns that the blockade will last at least until March 8