AUTHOR=Bitzegeio Julia , Hemmers Lukas , Bartel Alexander , Werber Dirk 

TITLE=Timely Monitoring COVID-19 Vaccine Protection, Berlin, Germany, April 15th to December 15th, 2021

JOURNAL=International Journal of Public Health

VOLUME=67

YEAR=2022

URL=https://www.ssph-journal.org/journals/international-journal-of-public-health/articles/10.3389/ijph.2022.1604633

DOI=10.3389/ijph.2022.1604633

ISSN=1661-8564