Last night while i was looking for pokemon for the pokeathlon, I found one of my pokemon in the computer had the pokerus! THE VIRUS CAN GET TO ANY OF YOUR POKEMON!!!
I isolate the pokemon so the others won't get infected by it. You do have the optional chose to release the pokemon but if that infected pokmemon is your FIRST pokemon then you'll have to bare with it.

The pokerus will go away in 4 days. If your pokemon still has it after 4 days... It's time to let it go...

UPDATE!! It is possible that you can catch a pokemon wiht the virus and not even knowing if it has or till you check the summery.
{4/12/10}UPDATE 2: pokemon in the computer that has the viurs will NOTinfect the others and my previuse words were worng. Pokemon in the computer don't randomly get the PKRS.