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Coronavirus immunity could only last a few months, scientists have found.
Research by Imperial College London estimated just 4.4 per cent of adults had some form of immunity against Covid-19 in September, when cases began to increase again.
This is compared with 6 per cent found to have antibodies between June 20 and July 13, and 4.8 per cent between July 31 and August 31.
Experts said the data from the Real-Time Assessment of Community Transmission (React-2) study showed immunity was “waning quite rapidly”, which could lead to an increased risk of reinfection.
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