My seven-and-a-half year old son has always had a high number of upper respiratory infections since toddler. Asthmatic symptoms include cough and sometimes wheezing when coming down with viral infection, and when exercising in cold weather. Infections resolve on own, but I'm concerned about high susceptibility to viral infection. Since school began in September, he has been ill with URI seven times, as well as with H1N1. Pediatrician did CBC and seems unconcerned, should I be? He's always been sickly compared to my other two children.