The Wuhan institute had been studying coronaviruses for years, in part because of widespread concerns tracing back to SARS that coronaviruses could be the source of the next pandemic.
A woman and her son remained locked in their house because of an extreme phobia of contracting coronavirus, ultimately forcing themselves into isolation for years.
The chances of China facing a major Covid-19 rebound in the coming next two or three months is unlikely as 80 per cent people have already been infected by the virus.