For my first time in about 300-400 hours of playing time on my Silver, Crystal, Ruby, and Sapphire, I finally got the Pokérus! My Sceptile got it! I'm just training for the E4/5 on the route left of Mauville, my 3rd battle vs. the female breeder, and I use my Sceptile a couple times. I go back to the Pokecenter because my Bug/Ghost guy had fainted, and Nurse Joy says something about the Pokerus. I check, and sure enough, Sceptile has it! ANyways, how do I spread the Pokerus, and how long does it take to wear off?