Some white-tailed deer living in the US are actively infected with the Omicron variant of SARS-CoV-2, the virus that causes Covid-19, according to a study. The yet-to-be peer-reviewed study, posted recently on the preprint repository bioRxiv, also found neutralising antibodies to SARS-CoV-2 in one of the Omicron-infected deer, suggesting that, like humans, these animals can be