no, i dont think there is.
Not at all.
first that pokerus second it triple the ev of a Pokemon for 3 days if his in your party if he in the PC the pokerus stays (pokerus its a very good thing) and you should put a Pokemon that have pokerus with Pokemon that don't have but didnt have to make him to get pokerus to.
pokerus is a virus thank is good for pokemon. it raises stats and hp.
No need to worry. Actually believe it or not the Pokerus is actually a good thing in the game. When your Pokemon have the Pokerus they gain double the effort points when your Pokemon are battling. It only lasts about two days before the affect wears off.
No it does not get you a bad egg
to identify a good milk, need to smell it. if it smells wired than its bad. another way is to tast it. if it tasts sawer that's its bad
No, the Pokerus will not stay forever. The Pokerus wears off within a day or two, even in the PC. Infect all of your Pokemon with it, since it is good for your Pokemon. Your Pokemon level up faster with the Pokerus. Once the Pokerus is gone, though, the same Pokemon can never contract it again (as evident by the smiley face on the Pokemon's summary menu next to its picture).
Pokerus is good because your pokemons stats will go up more than usual when they level up. There is a cure, to cure a Pokemon of pokerus just keep using it until a little dot shows up on its summary where it used to say PKRS. And IT WILL NOT DO ANYTHING TO YOUR GAME. So it is purely good.
Pokerus is a virus that infects your Pokemon. It catches this virus from a wild Pokemon that also has pokerus. If you keep a Pokemon with pokerus in you party, your other party members will also get this virus. However, this is a good virus as it doubles the EVs you earn from battles. Your Pokemon will eventually lose pokerus in four days but you can preserve it by keepin it in PC and allowing your other pokemons catching it.
It is a disease that effects your pokemon in many good ways.
It can delete your game and give pokerus and jus a whole lot more.