https://en.wikipedia.org/wiki/1977_Russian_flu https://en.wikipedia.org/wiki/1977_Russian_flu But it keeps happening and maybe labs working with such viruses n

https://en.wikipedia.org/wiki/1977_Russian_flu https://en.wikipedia.org/wiki/1977_Russian_flu But it keeps happening and maybe labs working with such viruses need much more careful procedures or shouldn’t perform risky gain of function research for example.