COVID-19 is an emerging, rapidly evolving situation. Get the latest public health information from CDC: https://www.coronavirus.gov . Get the latest research from NIH: https://www.nih.gov/coronavirus. Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/.
You can find an updated list of Coronavirus (Covid-19) dataset in the following link: https://www.researchgate.net/post/updated_list_Last_updated_July_10th_2020_of_Coronavirus_Covid-19_dataset_and_other_Research_Resources
Moreover, Here is an open dataset of 100 segmented axial CT slices from ~60 Italian patients: