Covid: 37% of people have symptoms six months after infection

A large study reveals the scale of long Covid, with symptoms affected by sex, age and severity of infection

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One in three people infected with coronavirus will experience at least one symptom of long Covid, a new study suggests.

Much of the existing research into the condition - a mixture of symptoms reported by people often months after they were originally ill with Covid-19 - has been based either on self-reported symptoms or small studies.