Figure 4. Effect of Environmental Factors on Microbial Transmission.

(A) Heat maps of the correlation between environmental factors and the weighted UniFrac distance between samples taken from the same room on the same day. (B) Seasonal change in the distances between the hands and noses of nurses working on the same floor. Trend lines are a smoothed moving average of the data. (C) Correlations between environmental factors and the distances of hand and nose samples for nurses working on the same floor on the same day. Color scheme is as in (A).