Phoenix Satellite Television:

Previous reports say that several miners fell ill inside a mine in Tongguan town, in Mojiang county of Yunnan province in 2012. According to what the experts know, is there a connection between these miners and the bat coronavirus RaTG13 or SARS-CoV-2? Thank you.

Yuan Zhiming:

In July and October 2012, the WIV team received 13 blood serum samples belonging to four of the miners from Tongguan town, which were collected by the First Affiliated Hospital of Kunming Medical University and sent by the Guangzhou Institute of Respiratory Health. We didn't detect any bat coronavirus in the miners' blood serum samples after conducting multiple nucleic acid tests, antibody tests, and genome sequencing. This also shows that these cases are not connected to SARS-CoV-2 at all. 

The RaTG13 coronavirus that you just mentioned is a viral sequence detected by the WIV team from the biological samples collected from Mojiang county in Yunnan province in 2013 and was not discovered from the blood serum samples of the sick miners that we received in 2012. So there is no evidence that the RaTG13 coronavirus and similar bat coronaviruses have any connection with the cases of the sick miners from Mojiang county in 2012. 

Of course, the WIV has made several public responses regarding the origin and distinctive features of the RaTG13 coronavirus and its difference from SARS-CoV-2. On July 24, 2020, the Science magazine published an interview with Professor Shi Zhengli, which disclosed that the evolutionary distance between the RaTG13 coronavirus and SARS-CoV-2 ranges from 20 years to 50 years. If you are interested in this, you can read the related content of that interview in the Science magazine. Thank you.