Population
asthma
ASTHMA
We retrieved 1 268 725 records with a hospital admission for asthma during 2002–2019 in England. After removing 6116 duplicate records, 12 records with place of residence outside England, 1 002 512 that did not occur during summer months, 34 605 aged <5 years and 180 records with missing sex or age, we had 260 085 records available for the analysis (