Vaccine for Swine Flu
The same flu vaccine that protects against seasonal flu also protects against the H1N1 swine flu strain. You can get it as a shot or as a nasal spray. Either way, it "teaches" your immune system to attack the real virus.
Besides a flu shot, there are other things you can do to stay healthy:
Wash your hands throughout the day with soap and water. Sing the "Happy Birthday" song twice to make sure you've washed long enough. Or use an alcohol-based hand sanitizer.
Don't touch your eyes, nose, or mouth.
Avoid people who are sick.