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Vaccinate children with poorly controlled asthma to cut COVID-19 risk: Research

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Experts advise that children and young people aged between five and 17 who have poorly controlled asthma should be considered for vaccination to reduce the risk of infection and the spread of the virus in schools and households

Children with poorly controlled asthma are three to six times more likely to be hospitalised with COVID-19 than those without the condition, according to research involving the University of Strathclyde.

Experts advise that children and young people aged between five and 17 who have poorly controlled asthma should be considered for vaccination to reduce the risk of infection and the spread of the virus in schools and households.

The researchers say that, considering the risks, some 9,000 of these children in Scotland could benefit from being vaccinated – and more than 109,000 children could benefit across the UK.

Around 1.1 million children in the UK are estimated to have asthma. Poorly controlled asthma was defined in this study as prior hospitalisation for asthma or being prescribed at least two courses of oral steroids in the previous two years.

The findings also highlight the importance of careful monitoring of children with poorly controlled asthma if they become infected with COVID-19.

The study has been published in The Lancet Respiratory Medicine. It predates the detection of the omicron variant of COVID-19.

The research team from Strathclyde, the Universities of Edinburgh, Aberdeen, Glasgow and St Andrews and Public Health Scotland analysed a dataset as part of the EAVE II project, which uses anonymised linked patient data to track the pandemic and covers 99% of the Scottish population.

The study is a result of a request by the UK’s Joint Committee on Vaccination and Immunisation (JCVI) to use EAVE II to investigate the risk of hospitalisation in school-aged children with poorly controlled asthma.

Professor Chris Robertson, of Strathclyde’s Department of Mathematics and Statistics and Public Health Scotland, a co-author of the study said: “COVID-19 can be a severe disease among children and this study has provided additional insight into which conditions can put some young individuals more at-risk. We hope the findings can assist the JCVI with its efforts to identify those who should be eligible for the vaccine and further extend the offer of protection to those most vulnerable to the virus. COVID-19 vaccines are already available for children aged 12 to 17 years and I would encourage those who have not yet been vaccinated to consider this option, particularly those who have experienced issues with asthma.”

Using the Scotland-wide EAVE II COVID-19 surveillance platform, around 750,000 de-identified health records for five to 17 year olds across Scotland were analysed, which included 63,463 children diagnosed with asthma.

Among children with asthma, there were 4,339 confirmed cases of COVID-19 between 1 March 2020 and 27 July 2021. Of these, 67 children were admitted to hospital. Among children without asthma, there were 40,231 confirmed cases of COVID-19, of whom 382 were admitted to hospitals.

Using two or more recent courses of oral steroids as the marker of poorly controlled asthma, 255 per 100,000 of children with poorly controlled asthma had COVID-19 hospitalisation, compared to 54 per 100,000 of children without asthma and 91 per 100,000 of children with well controlled asthma.

Among children with asthma, 548 per 100,000 of children who had been in hospital for asthma in the previous two years were hospitalised with COVID-19 compared with 94 per 100,000 who were not hospitalised for asthma in the previous two years.

The study was funded by the Medical Research Council, UK Research and Innovation Industrial Strategy Challenge Fund, the National Institute for Health Research and Health Data Research UK (HDR UK), and was supported by the Scottish Government.

Additional support was provided through the Scottish Government Director-General Health and Social Care, and the UKRI COVID-19 National Core Studies Data and Connectivity programme led by HDR UK.

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