The UK can’t even keep track of its spiralling Covid-19 case numbers
WiredGetty Images / OurWorldInData / WIRED Ten months after the first one, the UK is back where it started: stuck in a national lockdown. Taking a closer look at the test positivity rate in the UK may be the most efficient way of deciphering what exactly is going on, how virus transmission is happening – and whether enough testing is being done. Put simply, the test positivity rate is the number of tests that come back with a positive diagnosis, divided by the total number of tests done. As opposed to the actual number of confirmed cases, the test positivity rate can be used to tell how hard one has to look to find a case. According to the World Health Organisation, the test positivity rate should remain below five per cent for at least 14 days for an outbreak in a specific region to be considered under control.