My daughter is in a similar situation. It’s very frustrating to take her to some kids event and have kids around who are coughing and sniffling. I get it, it’s minor and they want to enjoy this event. But if my daughter gets sick, she’ll be nigh incapacitated for the next week or two by this “minor illness”. That “light cough” will have her coughing so hard that she vomits. She’s basically relegated to laying around and reading or watching TV. It makes school tough and is a fairly large part of why we homeschool.