1. https://towardsdatascience.com/face-mask-detection-using-yolov5-3734ca0d60d8
2. https://data-flair.training/blogs/face-mask-detection-with-python/
3. https://becominghuman.ai/face-detection-using-opencv-with-haar-cascade-classifiers-941dbb25177
4. https://www.cdc.gov/coronavirus/2019-ncov/community/organizations/business-employers/bars-restaurants
5. https://www.kaggle.com/omkargurav/face-mask-dataset