Fig. 1

NoV outbreaks in K/Ns, PSs, and NHs in Yokohama, Japan, 2007–2015. a Cumulative number of NoV outbreaks. The dashed line indicates 10 % (N = 74.6) of all outbreaks; b Monthly distribution of NoV outbreaks
NoV outbreaks in K/Ns, PSs, and NHs in Yokohama, Japan, 2007–2015. a Cumulative number of NoV outbreaks. The dashed line indicates 10 % (N = 74.6) of all outbreaks; b Monthly distribution of NoV outbreaks