COVID-19 Outbreaks in Settings With Precarious Housing Conditions in Germany: Challenges and Lessons Learned oleh Ruth Zimmermann, Navina Sarma, Doris Thieme-Thörel, Katharina Alpers, Tanja Artelt, Karima Azouagh, Viviane Bremer, Petra Broistedt, Tim Eckmanns, Nicolas Feltgen, Matthew Huska, Stefan Kröger, Angelika Puls, Simone Scheithauer, Eckart Mayr, Ute Rexroth