Fig. 2

Spatial and temporal distribution of the positive cases under study in Sardinia. SS: Sassari, NU: Nuoro, OR: Oristano, CA: Cagliari, SU: Sud Sardegna, N.D.: for these particular cases the province has not been indicated. : the origin of the infection was attributable to health-care workers or social and health-care facilities, : the origin of the infection was unknown, : the origin of the infection was known but not attributable to health-care workers or social and health-care facilities. Red: females, Blue: males. MAR 1, MAR 2, MAR 3, MAR 4: first, second, third, fourth week of March