Asthma is a chronic respiratory disease that affects more than 25 million people in the US. Asthma generally causes swelling of your airways, making it harder to breathe and causing symptoms like ...
In this April 4, 2017 photo, Javier Sua demonstrates how he uses an inhaler at his home in Fresno, Calif. He uses it to combat asthma, made worse by air pollution in the San Joaquin Valley. A new ...
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