Well, it cures over time or something like that, but, if I'm not mistaken, the effects of Pokerus are permanent. In each individual game, I believe there is one single outbreak, and after that, none of your pokemon can ever contract it out of thin air, though it can spread through trade. If a pokemon in your party gets it, it will spread to other pokemon in your party. If you put one of those in the box, it will spread to the pokemon in that box. Pokemon cannot get it twice, though. To keep the disease, just store one of the infected pokemon in the PC.
Anyways, if 18 Days would talk to me when we're both online, I'd be glad to give her something with it. Of course, she hasn't responded to my latest PM, so it's hard to say when this will happen.
It seems like the family fell apart after the mafia take-over. I mean, we used to sit down together and discuss who we should beat with a shovel, and now, everyone just stares at the TV. It's been a sad, sad few weeks. I've taken up beating Shecky's pokemon to a pulp to relieve the stored up aggression, nowadays.