Anything you can take to help increase your immune system is probably a good thing. I've started taking Vitamin C 3 times per day. Have you tried using seasalt as mouthwash? It might sting a bit, but it works well for infected tonsils. If you haven't attempted Hooshmand's 4 F's diet, I can't recommend it more highly. I notice when I don't follow it even for a few days my body revolts now--things like bladder infections, breaking out, etc.