Leaked documents add more weight to theory that virus leaked from the city’s Institute of Virology, say campaigners
Wuhan scientists were studying viral samples of high-risk bat species living in Laos - the country where the closest relative to Covid-19 has been found, leaked documents show.
We have summarized this news so that you can read it quickly. If you are interested in the news, you can read the full text here. Read more: