Professor Karina Butler:

That is a very interesting question to ask. It may be to do with their immune system and its ability either to tolerate this virus and not get the kind of hyper-inflammatory system that we have seen in some of the adults later on. It is a key question to be answered generally, but one of the things that we see very often with a coronavirus is that children get it and have very mild illnesses and then, as adults, are not troubled by it later on.