This four-week group discussion course is based on articles selected by the class leaders. This year we will focus on which scientific findings about COVID-19 seem to be well established. Topics to be discussed include the history of viral and bacterial epidemics and pandemics, why viruses are particularly suited to cause pandemics, and why they are difficult to eradicate and to treat medically. We will also examine the current status of COVID-19 vaccines and the public health challenges of containing this viral disease. Online article links will be provided, so an email account and internet connectivity are necessary. Limited enrollment.