p*******m
发帖数: 24 | 2 The earliest viral sequences, taken from people infected in late 2019 and
early 2020, are split into two broad lineages, known as A and B, which have
key genetic differences.
这个不就是多种毒株同时投放嘛，还传两次，牛B死了！
这些个貌似有头有脸的，怎么一个比一个能凹？
【在 p*******m 的大作中提到】
: Did the coronavirus jump from animals to people twice?
: https://www.nature.com/articles/d41586-021-02519-1
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