I've been exposed to H1N1 swine flu. What should I do?

  If you come into close contact with a person who has the flu -- especially if that person did not cover a cough or sneeze when you were within 6 feet -- you've been exposed. Exposure does not guarantee infection or illness, so there's still a good chance you won't get the flu.

What you should do next depends on your risk for getting severe disease and on the risk of severe disease in others with whom you cannot avoid contact.
If you have any of the conditions that put you at increased risk of severe H1N1 swine flu -- pregnancy, asthma, lung disease, diabetes, heart disease, neurologic disease, immune suppression, or other chronic conditions -- it may be riskier for you to get the flu than for other people. That also goes for children under age 2 years, young people under age 19 taking daily aspirin therapy, and people over age 65. And if you are a caretaker for an infant under age 6 months, that child is at risk of severe disease if he or she catches the flu from you.
The CDC advises against the use of the anti-flu drugs Tamiflu and Relenza to keep exposed people from getting the flu. That's because most of the few cases of drug-resistant H1N1 swine flu have popped up in people taking Tamiflu to prevent flu.