There are things you can really do to strengthen your immune system so it is more able to fight off pesky invaders, and less likely to over-react and attack your body (i.e., an autoimmune illness).
Studies show that women are more prone to colds and flus after having children -- and kids themselves are exposed to germs continually in childcare and preschool. So it's smart to take up arms against those microbial invaders!
Talk to your doctor about the best treatment. You should not expect to get a prescription for antibiotics. If you have a viral infection, antibiotics will not cure it, help you feel better, or prevent someone else from getting your virus.
Conventional medicine is great for things like stitching up our daughter's hand the time she accidentally cut it open with a steak knife. But when it comes to more subtle, "systemic" matters like preventing colds or recovering quickly if you still get one...