Mass Covid testing of secondary-school pupils in England is to be greatly increased in January, in an attempt to reduce the numbers being sent home.
Any students who have been in contact with a positive case will be offered seven days of daily testing, the Department for Education has announced.
Teachers can have weekly Covid tests.
Education Secretary Gavin Williamson said this "huge expansion" of testing would be a "milestone moment" in keeping schools open.
Hamid Patel, head of an academy trust that had piloted such testing, said it had been a "game-changer".
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