“What we need to bear in mind is, depending on what year you’re in, the bubbles are going to be different sizes.
“If you’ve got primary school children, it’s going to be relatively easy to teach them in one classroom, keep them in one bubble of possibly 30 people.”
Dr Sarah added: “If we test a child and they do turn out to be positive, then what Public Health England are saying is, get in touch, in a class, in a primary school class, it may be that they send the children home.
“In an older children’s group, if they are wearing face coverings in corridors and if they are not spending that much time in close contact to each other, they may not have to close down.”
BBC Breakfast airs daily on BBC One at 6am.
