Heidi Ledford Particles of SARS-CoV-2 (blue; artificially coloured) bud from a dying intestinal cell.Credit: Steve Gschmeissner/SPL In the chaos of the first months of the coronavirus pandemic, oncologist and geneticist Ami Bhatt was intrigued by widespread reports of vomiting and diarrhoea in people infected with SARS-CoV-2. “At that time, this was thought to be a...
