By participating in this challenge, the participants acknowledges that the datasets are provided for the purpose of the competition only. There is no claim to ownership/authenticity/validity of the datasets and annotations. Please do not rely on the datasets provided here for diagnosis purpose without detailed validation. Finally, the participants are encouraged to submit a quality publication, preferrably to CSBio2020 (http://www.csbio.org/2020/), based on their results from this challenge. Any publications must cite the following: Chan, J.H., Thammachart, P., Virasak, V., and Rodklang, P. (2020, July). DLAI3 Hackathon: COVID-19 Chest x-ray challenge, Version 1.0. Retrieved [date retrieved] from https://www.kaggle.com/c/dlai3/.