Figure 1 (IMAGE) DOE/Brookhaven National Laboratory Caption Pathogen concentrations after a three-hour, face-to-face conversation between an infectious person (left) and a susceptible person (right) in an example scenario. The susceptible person's exposure may be reduced if (A) they wear a mask, (B) the infectious person wears a mask, or (C) the ventilation rate is increased. Credit Laura Fierce https://doi.org/10.1111/ina.12989 Usage Restrictions https://doi.org/10.1111/ina.12989 License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.