Explainer: Do I need to worry about COVID again?

New data from scientists and vaccine makers Moderna (MRNA.O) and Pfizer (PFE.N)/BioNTech (22UAy.DE) suggests that a newer, highly mutated variant of the virus that causes COVID-19 is not as alarming as some experts had feared when it was first detected several weeks

COVID: should we start wearing masks again?

COVID Evolution and Variants: One thing that can be guaranteed about COVID is that evolution will provide us with a more or less constant stream of new coronavirus variants, some of which will be more successful at infecting people. Talk of mutations