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Asthma
Risk Factors
Asthma is common, affecting millions of adults and children. A number of factors are thought to increase the chances of developing asthma. These include:
- A family history of asthma
- Frequent respiratory infections as a child
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Exposure to secondhand smoke
- Living in an urban area, especially if there's a lot of air pollution
- Exposure to occupational triggers, such as chemicals used in farming, hairdressing and manufacturing
- Low birth weight
- Being overweight
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