Family history. Asthma may run in families (inherited). If this is the case in your family, your child may be more likely than other children to develop long-lasting (chronic) inflammation in the bronchial tubes.
Environment. Environmental factors and today's germ-conscious lifestyle may play a role in the development of asthma. Some experts believe there are more cases of asthma because of pollution and less exposure to certain types of harmful bacteria and other germs.1 As a result, children's immune systems may develop in a way that makes it more likely they will also develop allergies and asthma.
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