From a mother unable to smell her baby's nappy to a politician who suddenly could not taste food, some coronavirus patients have described a loss of olfactory senses, which experts say might be a new way to detect the virus.
Ear, nose and throat (ENT) specialists in Britain, the United States and France have noted a growing number of patients in recent weeks with anosmia - the abrupt loss of smell - and have said this could be a sign of COVID-19 in people who otherwise appear well.
Official figures suggest the coronavirus has infected some 380,000 people as the pandemic proliferates around the world, but with many cases going undetected experts have become concerned about the potential for people without symptoms to spread the virus.