Rocky
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They're doing something which I think is slightly odd in calculating the positivity rate. They're only using "people newly tested" as the denominator. So if someone gets tested today but was also tested three months ago, they wouldn't be included in the positivity rate calculation. I guess I kind of get it, because you maybe don't want to include health care staff, for example, who are tested every week. I can't remember the exact numbers but the other day it was something like 300 positive cases, 6,500 people newly tested, 24,000 tests. So that makes the reported positivity rate 4.6% (300 / 6,500). Basing it on the total tests would be 1.2%. I suspect the answer is somewhere in the middle.I guess you are right. I don't understand where the numbers come from though. Say the positivity rate is 5% and 4,000 new cases are reported daily in the UK, that indicates 80,000 people have been tested, yet the daily figures on the gov.uk covid site claim over 200,000 tests currently processed daily