COVID-19 patients have reported losses of smell or taste, prompting the researchers to add it to the growing list of symptoms for COVID-19.Recent research shows 20-25 per cent of patients now report a loss of taste, according to the team."More alarming is the rate of patients reporting loss of taste at a later date, sometime after exposure to the virus," said Hongxiang Liu, an associate professor at the University of Georgia in the US."This is something we need to keep a careful eye on," Liu said.The study also indicates that taste bud cells are not vulnerable to SARS-CoV-2 infection, because most of them do not express ACE2, a gateway that the virus uses to enter the body."This study isn't the first to study ACE2 expression in the oral.