HealthDay News — Early-life ozone (O 3) exposure is associated with asthma and wheeze outcomes at 4 to 6 years of age, according to a study published online April 2 in JAMA Network Open.

It can be very difficult to diagnose asthma. A chest X-ray typically won't show if a person has asthma, but can tell if something else (such as pneumonia or a foreign body in the airway ...