I think you're
My reason being.
Nobody likes Disease, or (illness), yet no matter what you're always with someone... the host. If you stay wherever you go, that's due to disease spreading in one way or another, staying there from then on. Sometimes unbeknowst. Because some diseases aren't detected until there's a lot of it you the country.
Apologies, this was my first answer ever on a puzzle such as this, so my answer had skipped over some information. I understand now that it was the wrong answer, or more to the point, an answer that was correct, though not quite specific enough on which.