Thank you very much. ^_^Carry them all around and get in battles. Though, if your main team is trained enough, pokerus won't do anything for them, because they've already been EV trained. I advise also infecting some trash, like a Bidoof or a Starly, and storing them in your PC, so that you always have something with Pokerus.
(my main team is in the upper-60s on their levels, is that too high to get the virus?)