Groups of pupils should only be sent home if there has been a positive test,
rather than someone just developing symptoms, the prime minister has said.
Boris Johnson said it was important for teachers and parents to examine the Public Health England guidance about testing.
Speaking to MPs on the Liaison Committee, he said: “The reasons for sending such a class home, or a bubble home, would be if somebody tests positive.”
Mr Johnson also said daily coronavirus testing capacity will reach 500,000 by the end of October.
He said demand for COVID-19 tests has “massively accelerated” in the last two weeks.
He also said many people are using tests so they can resume normal life.
The PM told MPs that the government will “very shortly” be setting out “the priority of the groups that we think should have tests”.
He added: “In schools, it’s very important that parents and teachers should look at the guidance about when you should get a test.”