Seasonal and Regional Variation of Asthma-related Hospitalizations and Mortality among adults in the United States

Asthma morbidity and mortality is known to exhibit seasonal trends and periodicity. Prior studies done in the US and other countries have suggested seasonal variations in asthma hospitalization but report conflicting results. While most studies note a peak in winter,1–3 various trends have been noted in different age categories and regions.1–5

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