Figure 2
From: Evaluation of different types of face masks to limit the spread of SARS-CoV-2: a modeling study
source control and wearer protection increase along the vertical and horizontal axes, respectively. Reductions in cumulative infections over 6 months are shown on the left; reductions in deaths are shown on the right. Heat maps were created with the R statistical software version 4.1.3 (https://cran.r-project.org/bin/windows/base/), with the benefit of the R packages ‘blockmatrix’53 and viridis (https://cran.r-project.org/web/packages/viridis/index.html).
Heat maps of the percentage reduction in cumulative infections at the end of 1 year relative to no mask use in the population, assuming a baseline R0 = 2.5. Assumes 60% of the susceptible population < 65 years old are wearing masks, 80% of those ≥ 65 years old wear masks, and both rates increase 10% for detectably infected persons (whether symptomatic or asymptomatic). The simulation posits that 18.3% of symptomatic infected people and 10.7% of asymptomatic infected individuals have been detected by screening and are known to be carrying SARS-CoV-2 (see the Supplement). Mask efficacy parameters for
