Begin with the original COVID-19 webinar, delivered on Jan 30, 2020. This webinar provides an overview of the epidemiological approach to outbreak investigation as well as the earliest findings. As this is an ongoing investigation, each of the updates covers only what has happened since the previous webinar.
The first update was given on March 2nd. The next update was given on March 16th. Because the Q&A for that session was nearly an hour, it is provided as a separate video.