  By incorporating delayed epidemic information and self-restricted travel
behavior into the SIS model, we have investigated the coupled effects of timely
and accurate epidemic information and people's sensitivity to the epidemic
information on contagion. In the population with only local random movement,
whether the epidemic information is delayed or not has no effect on the spread
of the epidemic. People's high sensitivity to the epidemic information leads to
their risk aversion behavior and the spread of the epidemic is suppressed. In
the population with only global person-to-person movement, timely and accurate
epidemic information helps an individual cut off the connections with the
infected in time and the epidemic is brought under control in no time. A delay
in the epidemic information leads to an individual's misjudgment of who has
been infected and who has not, which in turn leads to rapid progress and a
higher peak of the epidemic. In the population with coexistence of local and
global movement, timely and accurate epidemic information and people's high
sensitivity to the epidemic information play an important role in curbing the
epidemic. A theoretical analysis indicates that people's misjudgment caused by
the delayed epidemic information leads to a higher encounter probability
between the susceptible and the infected and people's self-restricted travel
behavior helps reduce such an encounter probability. A functional relation
between the ratio of infected individuals and the susceptible-infected
encounter probability has been found.
