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The NHS Covid symptom checker has been criticised by a study which found it may not pick up some people who are seriously ill. By being told to stay at home rather than consult a doctor, they may not receive treatment quickly enough.
NHS Digital says the 111 online service, used more than 3.9 million times in the past year, is not a diagnostic tool. The symptom checker has been constantly revised and updated, it adds.
The NHS 111 online Covid symptom checker asks a series of set questions about symptoms in order to offer people advice on their condition and what to do next.
The study, in BMJ Health and Care Informatics, used 50 simulated cases to compare online checkers used during the pandemic from four countries - UK, US, Japan and Singapore.
It found the symptom checkers used by the UK and US were half as likely to advise people to consult a doctor as the systems used in Japan and Singapore. Japan and Singapore also had the lowest case fatality rates of the four nations.
Despite improvements in the safety of the NHS 111 symptom checker since the research was carried out in April, the researchers said they still have "ongoing concerns".
Source: BBC News, 9 March 2021
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