  We present a differential equations model in which contagious disease
transmission is affected by contagious fear of the disease and contagious fear
of the control, in this case vaccine. The three contagions are coupled. The two
fears evolve and interact in ways that shape distancing behavior, vaccine
uptake, and their relaxation. These behavioral dynamics in turn can amplify or
suppress disease transmission, which feeds back to affect behavior. The model
reveals several coupled contagion mechanisms for multiple epidemic waves.
Methodologically, the paper advances infectious disease modeling by including
human behavioral adaptation, drawing on the neuroscience of fear learning,
extinction, and transmission.
