Each day, the Florida Department of Health releases hundreds of pages of data on coronavirus cases across the state.
One of the most-closely watched metrics is the percentage of tests that come back positive.
Because that can be a fickle figure -- fluctuating day to day for various reasons -- epidemiologists say it's more valuable when examined over longer time periods.
NBC 6 has been keeping seven-day weighted averages for the state and Miami-Dade and Broward counties.
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Those trends show the prevalence of the virus has largely levelled off in recent weeks, though Miami-Dade has seen a very slight uptick of late.
Statewide, for the week ending Sept. 1, the positivity rate for all tests was 7.8% (the state also tracks positivity for new cases, but these numbers are for all test results received). Over the next seven days, the rate dropped to 7.4%, then down to 6%, 6.1%, 5.8% and, finally, 5.6% for the week ending Tuesday.
In Miami-Dade, the positivity rate for new cases fell from 7% for the week ending Sept. 1, to 6%, 4.7% and 4.2% in subsequent weeks. But it then increased to 4.9% for the weeks ending Sept. 29 and Tuesday.
Broward has done better. Its new case rate dropped from 4.6% for the week ending Sept. 1, to 3.8% the following week and has hovered around 3% for the seven days ending on Tuesdays ever since: 2.9%, 3.1%, 2.9% and 3.1%.
