Factors affecting aerosol SARS-CoV-2 transmission via HVAC systems; a modeling study
Fig 6
Infection probability as a function of dose for the Wells-Riley quanta of infection model and a Probit model with an ID50 of 240 PFU and Slope of 1.16.
Two translations between quanta and PFU are shown, one using the PFU required to achieve an infection probability of 63% which defines one quanta (1 quanta ≅ 469 PFU) and the other using the quanta required to achieve an infection probability of 50% which defines the ID50 (240 PFU ≅ 0.69 quanta).