The Centers for Disease Control and Prevention (CDC) measures community transmission using two measures – the number of cases per 100,000 people and the test positivity rate, both measured in the previous seven days.
The latest CDC figures show an alarming increase in the number of counties considered to be at high risk of community transmission. As of Monday, 2,361 counties in the United States were listed in the “high” level, a marked increase from 457 counties at the same level in early July. A look at the past five weeks shows how rapidly community transmission has increased across the country.
An area with a low transmission rate has 10 or less cases per 100,000 people and a positivity rate less than 5%, while an area with a high transmission rate has 100 or more cases per 100,000 people and a rate of positivity of 10% or more.
- Track cases of Covid-19 in the United States where you live
- How many people are vaccinated in your state
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