1. Basic definitions for outbreak epidemic and pandemic. https://www.webmd.com/cold-and-flu/what-are-epidemics-pandemics-outbreaks
2. Covid-2019 datasets from https://www.kaggle.com/allen-institute-for-ai/CORD-19-research-challenge
3. Machine learning information. https://en.wikipedia.org/wiki/Machine_learning
4. Types of Machine Learning. https://searchenterpriseai.techtarget.com/definition/machinelearningML
5. Deep Learning Information. https://www.tutorialspoint.com/tensorflow/tensorflow_machine_learning_deep_learning.htm