COVID-19 vaccines are critical for containing the pandemic and preventing serious SARS-CoV-2 infections. In addition to the two main doses, a booster dose has been utilized to improve immunity. The aim of current study is to evaluate Iraqi adult population knowledge, attitudes, and practices towards COVID-19 booster dose.

This online cross-sectional survey of adult Iraqis (n = 754) assessed the attitudes of people who have had both immunizations regarding a potential COVID-19 vaccine booster dosage and to identify potential factors that might impact these attitudes. Factors evaluated in the current study included previously received vaccine type in the first two doses, socioeconomic characteristics, health status, knowledge about COVID-19 and its vaccines and adherence to protective practices.