 My son Aiden has asthma. Secondhand smoke has triggered his asthma so bad to the point where he had to end up in the emergency room. And he has spent multiple nights in intensive care. Now he's on a whole bunch of medications. My tip to you is, don't be shy to tell people not to smoke around your kids. Four out of ten U.S. kids are exposed to secondhand smoke. If you or someone you know wants free help to quit smoking, call 1-800-QUIT-NOW. A message from the Centers for Disease Control and Prevention.