[asveikau]

> I'm not sure how we all made it.

I am not a scientist or any kind of expert. But I thought I read somewhere that there are some ape species for whom SIV is endemic and harmless. Others get sick and die.

So maybe it just takes time for a species to adapt and it's very deadly right now because humans haven't been exposed for very long.

[bawolff]

A lot of deadly diseases become deadly by crossing the species barrier. Long term its a better survival strategy to not kill your host.