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A novel measles-like virus would be highly spreadable and "impossible to control by even the strictest lockdown", making it "a threat far worse than Covid."

The easily spreadable winter virus can affect people of all ages and have huge consequences - often closing hospital wards, taking children out of school and keeping parents off work.

A rise in cases of the highly spreadable measles virus, which can be very serious in some children, is feared when the new term starts.

Mix cream soup with a little mayo, several shakes of Worcestershire and a swirl of olive oil to make a thick but spreadable sauce.

"This suggests that sick people and healthy people evaluate the consequences of concealment in different ways," Merrell said, "with sick people being relatively insensitive to how spreadable and severe their illness may be for others."