You can download this dataset from the following link
https://data.mendeley.com/datasets/8h65ywd2jr/2
This COVID-19 dataset consists of Non-COVID and COVID cases of both X-ray and CT images. The associated dataset is augmented with different augmentation techniques to generate about 17100 X-ray and CT images. The dataset contains two main folders, one for the X-ray images, which includes two separate sub-folders of 5500 Non-COVID images and 4044 COVID images. The other folder contains the CT images. It includes two separate sub-folders of 2628 Non-COVID images and 5427 COVID images.
Cite it in your research work: El-Shafai, Walid; E. Abd El-Samie, Fathi (2020), “Extensive and Augmented COVID-19 X-Ray and CT Chest Images Dataset”, Mendeley Data, v2
For any questions, do not hesitate to contact me. Regards Walid El-Shafai eng.waled.elshafai@gmail.com