In 2011, March 11th, the big earthquake attacked eastern Japan followed by huge tsunami and nuclear plant accident. Consequently a lot of people could not help living in evacuation sites. Since those evaluation sites have high density of population and were not necessarily good in sanitary condition, outbreaks of influenza, norovirus or other infectious diseases were concerned.

Objective

For an early detection and control of an infectious disease outbreak, we developed and have been operating syndromic surveillance for evacuation sites, "evacuation site surveillance."