Fig. 1From: High class filtering facepiece (FFP) are fundamental and effective in protection of emergency health care workers: an observational cohort study in a German communityIncidence of SARS-CoV-2 positive cases in the metropolitan area of Göttingen. The incidence within the past 7 days presented as cases/100,000 inhabitants. Three pandemic waves were reported with peaks in April, June and December 2020. By December 2020 1.02% of the population has been infected with SARS-CoV-2 [Personal communication with the local public health department Göttingen]Back to article page