The effectiveness of primary series CoronaVac vaccine in preventing COVID-19 illness: a prospective cohort study among health workers in Azerbaijan, May–November, 2021
Mark A. Katz*1, Madelyn Yiseth Rojas Castro *2, Nabil Seyidov3, M. Trent Herdman4, Samir Mehdiyev3, Jason McKnight1, Alina Guseinova1, Radu Cojocaru1, Jason Doran4, Barbara Mühlemann, 5,6 Christian Drosten,5,6 Javahir Suleymanova7, Richard Pebody1, Esther Kissling2, Gahraman Hagverdiyev3
*authors contributed equally to the study
Corresponding author: katzm@who.int
  1. World Health Organization Regional Office for Europe, Copenhagen, Denmark
  2. Epiconcept, Paris, France
  3. Public Health and Reforms Center, Ministry of Health, Azerbaijan Republic
  4. UK Field Epidemiology Training Programme, UK Health Security Agency, UK
  5. Institute of Virology, Charité–Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt- Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany
  6. German Centre for Infection Research (DZIF), partner site Charité, 10117 Berlin, Germany
  7. World Health Organization, Baku, Azerbaijan