Figure 1
From: Evaluation of different types of face masks to limit the spread of SARS-CoV-2: a modeling study

Schematic of compartmental model. Compartments are susceptible (S, green), exposed (E, yellow), infectious compartments (pre-symptomatic P, asymptomatic and detected Ad, asymptomatic and undetected Au, symptomatic I, pink), recovered (R, gray), and died (D, gray). Superscript ‘n’ denotes no mask, and ‘m’ denotes mask.