February 2021 update:
Information from the American College of Rheumatology Regarding Vaccination Against SARS-CoV-2
https://www.rheumatology.org/Portals/0/Files/ACR-Information-Vaccination-Against-SARS-CoV-2.pdf
https://www.rheumatology.org/Portals/0/Files/ACR-Information-Vaccination-Against-SARS-CoV-2.pdf
https://dgrh.de/Start/Wissenschaft/Forschung/COVID-19/Impfung-gegen-SARS-CoV2.html
https://www.rheuma-liga.de/aktuelles/detailansicht/coronavirus-infos-fuer-menschen-mit-rheuma