Figure 1

Diagram of our 10 compartments fate and transport exposure model. Solid arrows represent pathogen flows due to touching events or natural die off. Dashed arrows represent shedding from colonized patient to the porous and nonporous surfaces in the room. Black arrows represent time independent flows within the colonized and uncolonized patient’s room, and touching noses. Grey arrows represent time dependent flows to and from HCW’s skin and hands during the first 20 minutes of the hour (light grey) and during the next 20 minutes of the hour (dark grey).