Could nearly half of those with Covid-19 have no idea they are infected?

As studies confirm many infected people show no symptoms, contact tracing and face masks assume even greater importanceCoronavirus – latest updatesSee all our coronavirus coverageWhen Noopur Raje ’s husband fell critically ill with Covid-19 in mid-March, she did not suspect that she too was infected with the virus.Raje, an oncologist at Massachusetts General Hospital in Boston, had been caring for her sick husband for a week before driving him to an emergency centre with a persistently high fever. But after she herself had a diagnostic PCR test – which looks for traces of the Sars-CoV-2 virus DNA in saliva – she was astounded to find that the result was positive.Continue reading...
Source: Guardian Unlimited Science - Category: Science Authors: Tags: Coronavirus outbreak Infectious diseases Medical research Microbiology Science World news Source Type: news