China to test thousands of Wuhan blood samples in Covid-19 probe
The store of up to 200,000 samples, including those from the closing months of 2019 were pinpointed in February this year by the World Health Organization’s panel of investigators as a possible source of key information that could help determine when and where the virus first crossed into humans.
The samples are kept in the Wuhan Blood Center, and are thought to span 2019, providing real-time tissue samples from a wide swathe of the population in the Chinese city where SARS-CoV-2 is thought to have first infected humans. (Foreign Agencies)