(CNN) -- The Centers for Disease Control and Prevention's February vital signs report focuses on controlling asthma in children.
1 in 12 kids in the U.S. up to age 17 have asthma. That's about 6 million children and teens.
Of those, half had 1 or more attacks in 2016.
"It's a major diagnosis in terms of pediatric chronic illnesses," says Dr. Elizabeth Woods, associate chief of adolescent/young adult medicine at Boston Children's Hospital.
The CDC says asthma can be considered well-controlled if a person exhibits symptoms no more than 2 days a week, if sleep isn't interrupted more than 1 or 2 nights a month, and if normal activities aren't difficult to complete.
People with controlled asthma should have no more than one attack a year that requires treatment with a pill or liquid.
To help manage your child's asthma, make an action plan with your doctor and make sure teachers and caregivers know about it.
Learning about asthma and how to manage it, could be life-saving.