Patients line up in front of a medical practice in Berlin, Germany, to give blood samples for Covid-19 testing and possible detection of coronavirus antibodies, March 30, 2020.
© 2020 Kay Nietfeld/picture-alliance/dpa/AP Images
Patients line up in front of a medical practice in Berlin, Germany, to give blood samples for Covid-19 testing and possible detection of coronavirus antibodies, March 30, 2020.