Fig. 1

Infection incidence per 1000 resident days in nursing homes by month¹ (n = 640,486 resident days). ¹For comparison, incidence registered by the Dutch surveillance network for infectious diseases in nursing homes (SNIV) is also depicted (grey dotted line). The dashed vertical lines indicate the three study periods (Baseline, Follow-up 1, and Follow-up 2). ²SNIV did not provide data for MRSA