It's not about you. It's always difficult to determine and conceptualize personal risk, but in this case, maybe even harder: people are caught between the extr

It's not about you. It's always difficult to determine and conceptualize personal risk, but in this case, maybe even harder: people are caught between the extremes of "I'm healthy, and it's very unlikely to harm me", vs. "this may kill millions of people around the globe unless we get lucky, and/or are very serious about the measures we take to contain it". (Both of these statements are true [for most people] yet seem irreconcilable.) So you staying at home and not getting the virus probably doesn't make much of a difference to you, aside from not feeling crappy for a couple of weeks. But if we all do it, then on a population scale it will make a difference, as it's one of the actions that can contribute towards preventing potentially millions of people dying. You might not feel that you would ever be responsible for transmitting the virus to a vulnerable person who then dies, and that might be true... but again on a population scale, someone is responsible, and that infection could potentially have been prevented by this (and other) measures.