Dec 2, 2021
Omicron variant may have evolved in rats, one theory says
The newly identified omicron coronavirus variant may have evolved in a nonhuman animal species, potentially a rodent, some scientists suggest. According to this theory, an animal may have picked up SARS-CoV-2, the virus that causes COVID-19, around mid-2020, STAT reported. After accumulating many mutations in the animal, the altered coronavirus...