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Comprehensive analysis of 50 states shows greater spread with mask mandates


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For months, we've been lectured to by the political elites that cases of coronavirus are spreading too quickly and that we must wear masks to stop the spread. The obvious fault with their act of desperation is that they can no longer mask the fact that most parts of the country have already been fully masked for months — long before the ubiquitous spread this fall.

Researchers at RationalGround.com, a clearinghouse of COVID-19 data trends run by a grassroots group of data analysts, computer scientists, and actuaries, did an analysis of all 50 states divided by those that had mask mandates and those that did not. Justin Hart, co-founder of the website, posted the results in a Twitter thread and shared with me the data analysis:
They studied the number of cases over a 229-day period from May 1 through Dec. 15 and divided the results of the two study groups by days with mask mandates and days without mask mandates. The non-mandate data group includes both states that never had a mandate and those that did at some point, but data set included only the days they did not have a mask mandate.

The results: When comparing states with mandates vs. those without, or periods of times within a state with a mandate vs. without, there is absolutely no evidence the mask mandate worked to slow the spread one iota. In total, in the states that had a mandate in effect, there were 9,605,256 confirmed COVID cases over 5,907 total days, an average of 27 cases per 100,000 per day. When states did not have a statewide order (which includes the states that never had them and the period of time masking states did not have the mandate in place) there were 5,781,716 cases over 5,772 total days, averaging 17 cases per 100,000 people per day.

The reverse correlation between periods of masking and non-masking is remarkable.

The 15 states that did not have a statewide mask mandate for the duration of this analysis were Alaska, Arizona, Florida, Georgia, Idaho, Iowa, Missouri, North Dakota, Nebraska, New Hampshire, Oklahoma, South Carolina, South Dakota, Tennessee, and Wyoming.

Importantly, for purposes of this study, the analysts gave the mask mandate states a 14-day grace period from the time of implementation in order to begin counting cases against mask efficacy. This gives time for the existing spread from the original policy to become obsolete, in order to more accurately assess the efficacy of the mandate. Proponents of the mask mandate might suggest that mask mandates were often imposed once cases already spread quickly, so there is a negative bias of increased cases in those areas (or times) that had mandates in place. However, there was no evidence of any reduction in cases or even better outcomes many weeks later. In fact, Ian Miller, one of the researchers at RationalGround.com, found that three counties in Florida (Manatee, Martin, and Nassau) that allowed the mandate to expire after having implemented it had fewer cases per capita than those counties that kept the mandate.
Nor has the mandate worked in states where it was implemented long before the surge in cases began.
California is the ultimate example of a state that had a mask mandate in place forever — long before its turn for spread hit in earnest.

The simple reality is that there is no legitimate data showing the mandates worked.

My first question when reading this analysis was that perhaps there is a bias in case counts against those areas with mask mandates because, by definition, most areas without them are more conservative and tend to have lower population density. After all, dense areas seem to be associated with more spread, and therefore, those areas must be judged by a different standard.

First, it's important to recognize that over the past few months, as the virus has spread rapidly to the low-population states and counties, the gap between the urban and rural areas has really closed as the virus appears to be giving everyone equal treatment. Also, included in the top-line number of 17 cases per 100,000 in the non-mask states are also the larger states that did eventually adopt a mandate, but had prior days without the mandate in which the cases were counted among the non-mandate data set. Thus, the study is more apples-to-apples than simply taking places that never had a mandate vs. those that always did over the entire study period.

More fundamentally, this study analyzed Florida by county data and shows no correlation between mask mandates and fewer cases, even adjusting for population density. Gov. Ron DeSantis has notoriously declined to issue a statewide mandate in the Sunshine State; however, of the 67 total counties in Florida, 22 have implemented an executive mask order at some point during the study period. Two of them (Miami-Dade and Osceola) were in effect for the entire period, while the other 20 began in the spring, summer, or fall.
What are the results?

When counties did have a mandate in effect, there were 667,239 cases over 3,137 days with an average of 23 cases per 100,000 per day. When counties did not have a countywide order, there were 438,687 cases over 12,139 days with an average of 22 cases per 100,000 per day.

Read the whole article here.
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