Here are some ways to build up your immune system to better fight infections:
Immunity Builders (Each block of info is followed by the link to the source)
Zinc -- 15 mg
When it comes to fighting disease, the mineral zinc is often a heavyweight contender. It stimulates the production of T lymphocytes, the cells in your immune system that are responsible for cleaning up cells that have been invaded by infection.
Vitamin A 25,000 international units
Vitamin C 4,000 milligrams, taken as 2 divided doses
Vitamin E 400 international units
Zinc 15 milligrams
Probiotics: supplements or fermented food such as sauerkraut with each meal. Sauerkraut is a natural source of lactobacilli. Two tablespoons with each meal maintain a healthy intestinal flora.
Garlic, kelp, shiitake mushrooms, and more:
Avoidance or elimination of Sugars
I hope this helps.