Originally Posted by TransWorld

It appears to me this is saying some areas have 60-80% of the tests coming back positive. That does not mean that percentage of people would test positive. Those many have had a much more restrictive number of test.

The inner areas that are 10-20% positives may have a much greater, more broad testing.

As an example, if you have a population of 100 and you test 10 people, with 8 positives, you would have 80% of tests positive.

On the other hand, if you have a population of 100 and you test 80 people, with 8 positives, you would have 10% of tests positive.

Neither of these examples would lead to a conclusion of herd immunity. Without the percentage of the population being tested, this data is meaningless.