Sexual health testing service Better2Know mapped rates of STIs across the country and found London to be the worst-performing region by far, with an average of 1.71 diagnoses per 100 people tested, compared to the national average of just 0.85 per 100. London's boroughs make up the top 15 worst areas in England for the highest rates of new STI cases, according to data from Public Health England. Outside of London, these are the 20 areas across the UK with the highest rates of new STI cases.
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