male pediatrician greeting patient's mother before medical checkup

25 million Americans are living with asthma

When you control your asthma, you can lead a full and active life.


Illustration of a group of people forming the shape of a lung. Text reads Breathe Better Network

Join the Breathe Better Network

The Breathe Better Network is a partnership of organizations from across the country, serving all 50 states and the District of Columbia. The Network conducts outreach to individuals in their community.


Health Professionals

scan of lungs

Advancing the Research on Lung Diseases

Learn how NHLBI conducts and supports research that expands our understanding of lung biology and how lung diseases start and progress.