![Pirna, Germany. 07th Dec, 2020. A sign for the mask obligation is screwed on in a pedestrian zone in the old town. According to figures from the Robert Koch Institute (RKI), the Pirna, Germany. 07th Dec, 2020. A sign for the mask obligation is screwed on in a pedestrian zone in the old town. According to figures from the Robert Koch Institute (RKI), the](https://c8.alamy.com/comp/2DFY9P3/pirna-germany-07th-dec-2020-a-sign-for-the-mask-obligation-is-screwed-on-in-a-pedestrian-zone-in-the-old-town-according-to-figures-from-the-robert-koch-institute-rki-the-7-day-incidence-in-the-district-of-saxon-switzerland-eastern-ore-mountains-climbed-above-the-500-new-infections-per-100000-inhabitants-within-one-week-credit-robert-michaeldpa-zentralbilddpaalamy-live-news-2DFY9P3.jpg)
Pirna, Germany. 07th Dec, 2020. A sign for the mask obligation is screwed on in a pedestrian zone in the old town. According to figures from the Robert Koch Institute (RKI), the
![Kehl, Germany. 17th Mar 2020. Police officers work at the border between Germany and France in Kehl, Germany, March 17, 2020. According to the German federal disease control agency Robert Koch Institute, Kehl, Germany. 17th Mar 2020. Police officers work at the border between Germany and France in Kehl, Germany, March 17, 2020. According to the German federal disease control agency Robert Koch Institute,](https://c8.alamy.com/comp/2B7PWYJ/kehl-germany-17th-mar-2020-police-officers-work-at-the-border-between-germany-and-france-in-kehl-germany-march-17-2020-according-to-the-german-federal-disease-control-agency-robert-koch-institute-covid-19-cases-in-germany-have-increased-by-1174-from-sunday-to-6012-on-monday-with-13-deaths-germany-has-largely-closed-its-borders-with-france-austria-switzerland-denmark-and-luxembourg-from-monday-to-contain-the-spread-of-the-coronavirus-photo-by-ulrich-hufnagelxinhua-credit-xinhuaalamy-live-news-2B7PWYJ.jpg)
Kehl, Germany. 17th Mar 2020. Police officers work at the border between Germany and France in Kehl, Germany, March 17, 2020. According to the German federal disease control agency Robert Koch Institute,
![Stamp: Robert Koch (1843-1910) bacteriologist (Switzerland) (Famous persons) Mi:CH 958,Sn:CH 538,Yt:CH 889,Sg:CH 822,AFA:CH 953,Z… | Stamp, Postage stamps, Thematic Stamp: Robert Koch (1843-1910) bacteriologist (Switzerland) (Famous persons) Mi:CH 958,Sn:CH 538,Yt:CH 889,Sg:CH 822,AFA:CH 953,Z… | Stamp, Postage stamps, Thematic](https://i.pinimg.com/474x/03/4a/2d/034a2d6e073fb53213ef39a7d8673bfe.jpg)
Stamp: Robert Koch (1843-1910) bacteriologist (Switzerland) (Famous persons) Mi:CH 958,Sn:CH 538,Yt:CH 889,Sg:CH 822,AFA:CH 953,Z… | Stamp, Postage stamps, Thematic
![Robert Koch Lecture 2017 - Dissecting human antibody responses: useful, basic and surprising findings | Max-Planck-Institut für Infektionsbiologie Robert Koch Lecture 2017 - Dissecting human antibody responses: useful, basic and surprising findings | Max-Planck-Institut für Infektionsbiologie](https://www.mpiib-berlin.mpg.de/event_images/11312-1508416937.jpeg)