Genome sequencing of thousands of SARS-CoV-2 samples shows that surges of COVID-19 cases are driven by the appearance of new coronavirus variants, according to new research […]
Hard-hit Brazil closed out its deadliest month of the coronavirus pandemic by far on Wednesday, with 66,573 people killed by COVID-19 in March, more than double […]
Brazil continues to break records for all the wrong reasons as it faces its deadliest episode of the pandemic yet, amid an escalating political crisis.More than […]
With millions of people receiving covid-19 vaccines globally, some countries have already started planning the implementation of “vaccine passports”—accessible certificates confirming covid-19…