For the past two or three weeks, the world has been fretting over a new Covid-19 virus variant in the UK, and imposing new travel restrictions to keep it out of other countries. But what if the variant is already everywhere?
For the past two or three weeks, the world has been fretting over a new Covid-19 virus variant in the UK, and imposing new travel restrictions to keep it out of other countries. But what if the variant is already everywhere?