Coronavirus update: While anyone can get COVID-19, people with moderate-to-severe asthma are more vulnerable to developing serious illness. If you have moderate or severe asthma, we suggest taking the extra precautions the CDC recommends.

Coughing, wheezing, shortness of breath — sound familiar?

About 25 million Americans deal with the symptoms of asthma, a lung disease that makes it difficult to breathe. Of those, it's estimated as many as 10% have uncontrolled or severe persistent asthma.

Learn what's considered severe when it comes to asthma, as well as how severe asthma is diagnosed and treated below.