W.H.O. Reopens Investigation Into COVID-19 Origins

The WHO is launching a new investigation into the origins of the coronavirus with a team of 20 scientists. The agency emphasizes the urgency of the investigation, warning that crucial evidence, such as blood samples, may soon be discarded. The new team will also explore the possibility of the virus having leaked from a Chinese lab, although previous investigations deemed this scenario extremely unlikely.

What possibility is the new team investigating regarding the virus?

How did the first group of investigators assess the likelihood of the virus leaking from a lab?