There was a huge number of cases before September around the world. Why didn’t we see the new more transmissive variants earlier? (One source could be cross-over from some animals, another is the rare cases of extremely long-lasting Covid infection. Curious if people are doing Bayesian calculations for this.)
It could be the time lag from when antibody-based plasma therapy (if that makes sense, I’m not even sure that’s how it works) started to be used somewhat widely, plus the time it takes for a new variant to spread enough to get noticed.
There was a huge number of cases before September around the world. Why didn’t we see the new more transmissive variants earlier? (One source could be cross-over from some animals, another is the rare cases of extremely long-lasting Covid infection. Curious if people are doing Bayesian calculations for this.)
It could be the time lag from when antibody-based plasma therapy (if that makes sense, I’m not even sure that’s how it works) started to be used somewhat widely, plus the time it takes for a new variant to spread enough to get noticed.
Yes, the more people infected with the virus, and the longer the virus is in people the more time for a successful mutation to arise.