Fig. 2.

All test results of both antibody tests in a time interval (in days) after PCR-confirmation of a SARS-CoV-2 infection. Red dots symbolize negative test results in both tests, gray dots positive results in both tests, triangles symbolize samples tested positive only with the Viramed-Test, and squares symbolize positive test results gained only with the Roche-Test. Arrow lines connect samples from two subjects that were initially tested negative with both test systems. However, both subjects displayed seroconversion during later tests. The six additional samples that tested negative with both test systems were obtained from subjects without additional samples provided.