The world map below shows the percentage of people worldwide who said they wore a mask each time they went out on June 19.
The map is taken from the website of IMHE at the University of Washington http://www.healthdata.org. IMHE produces projections of COVID-19 spread that are widely used in the USA, including by the federal government.
As usual, the United States is not using the most effective method for limiting the spread of COVID-19. Too many US residents think mask use is not necessary or is not effective. Why do they believe this? Would you believe that our president is telling them these lies?