In the United States alone about 20 million people have been diagnosed with asthma; nearly 9 million of them are children. The global population is also experiencing a spike in Asthma cases.
Asthma is closely linked to allergies. Most, but not all, people with asthma have allergies. Children with a family history of allergy and asthma are more likely to have asthma.
Although asthma affects people of all ages, it most often starts in childhood. More boys have asthma than girls, but in adulthood, more women have asthma than men.
Although asthma affects people of all races, African Americans are more likely than Caucasians to be hospitalized for asthma attacks and to die from asthma.