So, It's a week before Christmas, and i'm pretty sure my brother has strep throat. Last night we shared a water. I didn't want him to, but he just took a drink. I did drink after him, but I took off the top and straw and just drank out of the cup. Lets just hope he didn't backwash! I'm really hoping I won't get it! I think I have a pretty strong immune system (*knocks on wood*), so i'm really hoping i'll be anble to fight it off. He dosen't seem to have a fever, but he says his legs, neck, and head ache along with a sore throat. I really hope I don't get it!! Does anyone know tips on how to strengthen your immune system?