Getting sicker

Wouldn't you know it? We take our son to the doctor's because of a light case of bronchitis. After waiting forever seeing the doctor for a couple of minutes then getting a prescription we were finally out the door. Withing thirty six hours after leaving the doctor's he comes down with a flu and then after another twenty four hours he gives it to his dad. Now I'm just wondering if my immune system is strong enough to hold it up.