@4yourinfo There are 3 types of people who test: healthcare workers, people who have reason the believe they may have gotten sick, and people who need to prove they didn't get sick (for whatever reason). The positivity rate is not a metric that tells you how many people are sick. It's a flag that tells you when the infection's prevalence in a certain area is rising, falling, or staying steady. When the positivity rate starts to climb, that means there is an increase of infected people among the 3 groups who test. Under any circumstances, a rise in rates is alarming. When the rate doubles, triples, or spikes even higher, that is an indicator of an outbreak in that area. It's not an absolute confirmation, as there may be mitigating factors, but it's an alarm. When that rate stays high for a number of days, it is an indication that a serious outbreak has begun in that area. The only reason it is used as a metric amongst the government types is because it is their only way of knowing when the virus is coming or going.