Covid mutations17 Dec 2021 18:02
I've previously posted on the virus jumping between species and thought the following snippet from the latest issue of New Scientist worth mentioning. Note the comment re molnupiravir - eeek!
"With omicron, it is also possible that the virus jumped to other animals, mutated and then jumped back to people, a phenomenon known as reverse zoonosis. Omicron has some mutations thought to be linked to adaptation to rodents.
Vivek Kapur at Pennsylvania State University, whose team recently found “gobsmacking” levels of SARS-CoV-2 in deer in the US, thinks it is likely that the virus is circulating undetected in other species, too. You cannot even begin to work out how to prevent spill-back from animal reservoirs if you don’t even know they exist, he says.
There might be another, rather surprising way that a variant could suddenly acquire a whole lot of mutations: it could happen in someone being treated with certain drugs. Some virologists think there is a risk with antiviral medication molnupiravir – which is meant to work by inducing so many viral mutations it kills the virus – and that it should be withdrawn.
Finally, in people infected with two viruses at once, there is the possibility of SARS-CoV-2 variants recombining with each other or with other human coronaviruses. There is great scepticism about a claim that omicron acquired one of its mutations this way, but there is evidence of recombination between SARS-CoV-2 variants."