At present, there are three types of new coronavirus: A, B and C. Among them, class A is the primitive virus type, which is most similar to the sars-cov-2 virus found in bats. Class B evolved from Class A, and class C is the variant type of class B. However, foster found that a virus is not the main virus type in Wuhan, and only a few patients with this virus type in Wuhan. Since we dont have a lot of early samples, we need to be careful when determining the source of the virus. In my opinion, we should not be limited to Wuhan, he said
As for whether the new coronavirus originated from Wuhan Virus Research Institute, foster thinks that Wuhan is not the most likely place, because the probability of a virus appearing here is not the highest.
In addition, Fosters study suggests that the new coronavirus may have spread in humans and animals before the first case was reported in China on December 1. According to the mutation rate, the initial successful transmission of the virus may have started as early as September 13, 2019, which is 95%.