The vaccination programme against COVID-19 has started in Turkey with agreement of the Turkish Ministry of Health on the supply of the inactivated SARS-CoV-2 vaccine (CoronaVac, by Sinovac Life Sciences, Beijing, China). We undertook a multicenter cross-sectional study of all healthcare workers who had received Coronavac® vaccine between 15th January and 15th March, 2021. A questionnaire was sent by email to 250 healthcare workers in four hospitals in Turkey.