1. https://covid19.who.int/
2. S. Ge, L. Jia, Y. Qiting, and L. Zhao, Detecting masked faces in the wild with lle-cnns. In Proceedings of the IEEE conference on computer vision and pattern recognition, pp. 2682–2690. 2017.
3. Z. Wang, W. Guangcheng, H. Baojin, X. Zhangyang, H. Qi, W. Hao, Y. Peng et al., Masked face recognition dataset and application. arXiv preprint arXiv:2003.09093 (2020).
4. https://drive.google.com/file/d/1mAwABgzExIIUfVnVEJlE61iVSsPh0SA/view?usp=sharing
5. https://github.com/X-zhangyang/Real-World-Masked-Face-Dataset