Prevalence of breakthrough COVID-19 infection among healthcare workers in Baghdad.

Objective: To determine the prevalence and severity of breakthrough coronavirus disease-2019 infection among health workers, and to assess health workers' post-vaccination adherence to preventive guidelines.

Methods: The cross-sectional study was conducted from December 2021 to March 2022 at 2 major hospitals in Baghdad, Iraq, and comprised physicians, pharmacists, dentists and paramedical staff present at time of data collection. The participants were classified according to vaccination status with history of infection.