୧୩ ନମୁନା ନେଗେଟିଭ

23 January 2020, Berlin: A laboratory technician works with a pipette at the Institute of Virology at the Charité Berlin Mitte, where investigations on coronavirus are underway. The Chinese government has practically sealed off the metropolis of Wuhan, which is particularly hard hit by the new lung disease caused by the coronavirus. Photo: Christophe Gateau/dpa