I just survived a house full of strep throat..not sure HOW I managed to do that, but I think a few things helped.
One being I supplemented zinc twice a day after breakfast and dinner and 2nd, I ate raw onions, which pretty much will kill any living thing in my throat and sinuses. Not sure if those were the silver bullets, but coming out clean of a house filled with 2 snotty kids and wife is something I have to brag about.
Winter regimen: Onions, vinegar and zinc. The kids love to bring home germs from public school.