[ajuc]

If you want to extinct homo sapiens you should probably make a virus that infects everybody and has as little symptoms as possible and then kills them a year later.

We don't know yet if this virus has any long-term consequences. HIV would seem harmless if we estimated its effects after 1 month.

But I don't think bioweapons need to be deadly. If you can make a virus that kills 2% of people but shuts down global trade with your main economic competitor for example - that's quite useful (if you don't care for morality of course).

I'm not persuaded it's human-created, but it's a possibility.