WriterMom
Veteran Member
Millions or billions of viruses around for millions or billions of years and we're not extinct.
What viral load makes us sick?
Also, since they can't see viruses without an electron microscope which was invented ( I believe) in 1930 we don't have 100 years empirical data.
I believe that the first discovery of a virus (the tobacco mosaic virus) happened in the late 1800s - that's more than 100 years ago. We also don't need to "see" a virus to know it exists.