Masks Have No Impact

 Government data shows masks have no impact on COVID spread - WND

A graph that overlays data from surveys on mask usage with the number of coronavirus cases confirms studies that indicate the face coverings have no significant impact on the spread of the coronavirus. Using data culled from YouGov.com and the Covid Tracking Project from March 20, 2020, to March 3, 2021, economist Brian Westbury created the chart and posted it on Twitter.

Surveys showed mask usage reached about 80% by midsummer last year and has remained consistent since then. During that period, however, the number of daily positive cases rose and fell precipitously. Many epidemiologists have noted the coronavirus, in a second major wave, is following the bell-shaped pattern of epidemics predicted by Farr's Law in 1840, regardless of mitigation efforts.

Another chart, from a Financial Times analysis of the Covid Tracking Project, shows very little difference in the number cases between North Dakota and South Dakota. That's despite the fact that North Dakota has had a mask mandate, while South Dakota has not.