The COVID-19 Radiography Database is a chest X-ray image database created by researchers from Qatar University, Dhaka University, and other countries in collaboration with doctors. This database contains images of COVID-19 positive cases, normal conditions, and viral pneumonia to help researchers conduct research during the COVID-19 pandemic. The dataset contains 3,616 COVID-19 positive cases, 10,192 normal cases, 6,012 lung opacity (non-COVID-19 lung infection) cases, and 1,345 viral pneumonia images and corresponding lung mask images.