Foto: "<a href="https://www.ccnull.de/foto/man-suffer-from-cough-with-face-mask-protection-and-coronavirus-symptoms-list/1037818" target="_blank">Man suffer from cough with face mask protection and Coronavirus Symptoms list</a>" von <a href="https://www.ccnull.de/fotograf/marco-verch" target="_blank">Marco Verch</a> via <a href="https://www.ccnull.de" target="_blank">ccnull.de</a> - <a href="https://www.flickr.com/photos/30478819@N08/49566846673/" target="_blank">Bildquelle</a>, <a href="https://creativecommons.org/licenses/by/2.0/de/" target="_blank">CC-BY 2.0</a>