Q: I went to a friend’s house Saturday night, and today she is diagnosed with H1N1! How do I know for sure if I was exposed?
Dr. Tanya: There’s no way to know for certain if you were infected until symptoms develop, and that typically occurs within seven days of exposure. Meanwhile, if you are at special risk of complications from the flu, let your doctor know that you were exposed. You and your doctor can then decide whether you might benefit from preventive treatment. People at high risk of complications include pregnant women, the immune-compromised, and anyone with chronic medical conditions, such as heart disease or asthma.