Hello, the influenza outbreak this year has affected even those individuals who received the flu vaccine. Asthma can worsen during the flu which usually is a self limited illness and usually should resolve within about one week. Tylenol for his weight can be given every four hours as needed. Fluids, rest and monitoring his temperature also are important for his recovery. If his asthma or respiratory status worsen, he should seek medical advice from your pediatrician. Inhalers such as albuterol and possibly steroids may be needed if he worsens. My pediatric pulmonary practice accepts telephone consultations. If you have more information or questions, this can be faxed along with a copy of his insurance card to 858 259 9689. I can then give you a call a the number that you provide to discuss his case further. Only the insurance will be billed, no bill will be charged to you personally. Thank you for your questions.