I think it mutated into a more virulent version in the Boston area and from there on it really started kicking butt.
“I think it mutated into a more virulent version in the Boston area and from there on it really started kicking butt.”
Mutation of RNA viruses is 10x to 100x more frequent than dna viruses.
They change pretty rapidly. And the more infected hosts there are, the more rapid the mutations.
It’s another principal reason for strident mitigation.