“RSV is very contagious and very prevalent in the school system as well as throughout daycare centers and in homes. So RSV is certainly the winner. COVID is increasing in its prevalence. It’s not making children as sick as it has been in adults, but there are some children, particularly those at risk — those would be kids who are obese, have chronic kidney or heart disease or have other respiratory illnesses — tend not to do as well with COVID,” said Dr. Reginald Washington.