The swine flu is transmitted through touch, things and air. It is important to keep everything clean. Also it is better not to visit the crowded places when there is a flu epidemic. Of course, there are vaccines and pills that can improve immunity. In case you decide to take meds, I recommend to ask your doctor first, or at least read the detailed information about them online. Here
Canadian Pharmacy Online can help as this source provides its users not only with a wide range of products, but also with the descriptions of them.