Adults with asthma who have required two or more courses of oral corticosteroids in the previous 2 years or a hospital admission for asthma would require a booster dose of Covid vaccine as they are at higher risk of hospitalisation. A recent study conducted by a group of researchers on behalf of Public Health Scotland and the Eave II collaborators revealed that among adults with asthma, 39 253 (7·0%) had confirmed SARS-CoV-2 infections, of whom 4828 (12·3%) were admitted to hospital for COVID-19 (among them, an estimated 600 [12·4%] might have been due to nosocomial infections). Therefore, the researchers observed that adults with asthma were found to be at an increased risk of COVID-19 hospital admission (adjusted HR 1·27, 95% CI 1·23–1·32) compared with those without asthma. The study was conducted in all adults in Scotland aged 18 years and older as part of the UK’s Joint Commission on Vaccination and Immunisation’s quest to undertake an urgent analysis to identify priority groups for administering booster vaccine shots. The study, published in the Lancet, also found that patients with a recent asthma attack should be considered a priority group for booster COVID-19 vaccines as they are at  increased risk of both COVID-19 hospitalisation and ICU admission or death.