Doctors call for stricter coronavirus discharge rules
Thirteen of 18 patients who had been negative on two tests came up positive on a third test, say Chinese medics
Worrying cases of recovered coronavirus patients testing positive for the infection again have raised questions among doctors about the criteria being used for discharging people from hospital.
China has seen 80,000 cases of the coronavirus since it was believed to have emerged in a market illegally trading wildlife in the central city of Wuhan late last year.
While nearly 3000 people have died, more than 47,000 have recovered and been discharged from hospital.
But weeks