People whose body language is negative have a destructive, contagious effect on those around them. (businessinsider.com)
In the absence of such leadership, the Syrian crisis is likely to have a contagious effect, as refugees, arms, and militant Islamists cross borders in greater numbers than they have since the start of the Iraq War in 2003. (blog.politics.ox.ac.uk)
By using a computerized driving simulation, the study was able to eliminate the contagious effect, where driver behaviour can be influenced by the traffic around them. (sciencedaily.com)