My 6 year old has been unwell with a chest infection 2nd time this month since school reopened with a stomach infection in between. Prior to lockdown he wouldn’t be ill probably more than once or twice a year. One chest infection this time prompted a visit to A&E due to breathing difficulties which hasn’t happened since he was a toddler. Have you experienced more infections than usual in school going children this time? Can I do something to boost his immunity at all?