Doctors call for stricter coronavirus discharge rules

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 later, doctors in different parts of China have reported some people have tested positive for the pathogen again.