TEST TYPE: patients positive on both. Data reported below are from the German national reference laboratoryThis lab covers a more rural area in the western part of Germany (Westfalia). Data likely slightly underestimate national prevalence because prevalence in larger cities is higher. Reported in the numerator are those cases in which serology indicates a need for treatmentThe number of serologically positive cases is higher: 2 in the age group below 25 years and 8 in the age group 25 years and older. SOURCE: Sentinel surveillance. 