lawrain

some ideas on how to best boost you immune system are; eat more green vegetables as this helps white blood cells.
dark fruits are high in antioxidants and these give you a real boost. Try drinking purple grape juice in the mornings or have some blue berries with your cereal. Another idea is to take a supplement during the cold months when colds are abundant and fruitts are out of season. Something like a black elderberry liquid supplement would give you that important immune system boost.
Vitamin C is great too and you can get this from orange juice or also in a supplement like a dissolvable tablet.

Try to keep yourself hydrated and rested. Hopefully you wont catch anymore colds this year.
good luck