Fig. 2.

Impact of increasing air exchange on combined infection risk reduction following an 8 h-exposure to an infected worker (coughing) at various distances. For reference, air changes per hour (ACH) of 2–6 are representative of typical indoor food manufacturing facilities based on survey results. Included percentages represent the percent reduction in SARS-CoV-2 infection risk relative to no air exchange (baseline ACH = 0.1) for combined risk at the four distances (1 m, 2 m, 3 m, and >3 m) modeled. Results are presented as the median risk values with 5th and 95th percentile bars.