(HealthDay News) -- Asthma can begin at any age, but it usually starts in childhood.
The National Heart, Lung, and Blood Institute says risk factors for developing asthma include:
New Flu Strain Weakened This Year’s Vaccine Protection, CDC Says
New Flu Variant Could Bring Another Severe U.S. Season
Scientists' Push For a Universal Vaccine Takes a Key Step Forward
Breakdown In Federal Health Tracking Leaves U.S. Vulnerable To Outbreaks, Pandemics, Experts Warn
52 Kids Have Died From Flu So Far This Season as Child Hospitalizations Rise