I don't believe cats can pick up human viruses ... But I could be wrong ... Is there something different in Smudge's food? Cassie throws up almost all the time when I try to give her Fancy Feast. She loves it, but either she eats it too fast or it's too rich, because she often vomits partially digested food a few hours later. When I hear that sound - I put her on the kitchen floor, quick! I've just learned to give her verrrrrrry small amounts of the stuff at a time. I've heard about other cats in the same situation.