Llandough Primary School, Llandough
Y Bont Faen Primary School, Cowbridge
The seven schools have contacted the parents or guardians of all affected pupils directly. Pupils or staff outside of these bubble groups are not at risk.
More details about the arrangements for each school will be published on the Vale of Glamorgan Council website.
Cllr Lis Burnett, deputy leader of the Vale of Glamorgan Council and cabinet member for education and regeneration said: "This is a precautionary measure being taken to ensure any impact on schools is kept to a minimum. With more pupils returning to our schools and new variants of Covid-19 in circulation it is more important than ever that we act quickly and cautiously.