Fig. 3.

Contour plots of transmission probability of IAV: (a) uniform environment (dT/dy = 0), exposure time of 5 min; (b) uniform environment (dT/dy = 0), exposure time of 30 min; (c) stratified environment (dT/dy = 2 °C/m), exposure time of 30 min. Red denotes high probability and blue denotes low probability. Planes xy (z = 0), xz (y = 1.75 m), and yz (x = 2 m) are donated in Fig. 1. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)