Figure 4
From: Evaluation of different types of face masks to limit the spread of SARS-CoV-2: a modeling study
Effective reproduction (Re) number for given mask use by varying efficacy parameters shown on the horizontal and vertical axes. This analysis assumes 90% and 70% mask use rates for infectious and detected persons older and younger than 65 years of age, respectively, and 80% and 60% among susceptible persons for the same age breakdown. Asymptomatic detection and symptomatic awareness fractions are given in Table 1. The baseline R0 in the absence of mask use are assumed to be 2.5 (A, similar to the SARS-CoV-2 ancestral strain), 6.0 (B, similar to delta variant), 10.0 (similar to omicron B.1.1.529), and 13.0 (similar to the omicron BA.2 sub-lineage). Note that Re has a scale from 0.5 to 6 in heatmaps (A,B) and 1 to 13 in heatmaps (C,D). 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).
