Great course - but I believe there's one small inaccuracy.
Let me preface my comment by saying that I'm not a doctor! If I'm wrong, please feel free to correct me!
The course begins with "In late 2019, a new virus—since named COVID-19—emerged..."
Later we read, "This new virus is named SARS-CoV-2...The associated disease is called “coronavirus disease 2019,” which is abbreviated as COVID-19."
Since the "D" in COVID-19 stands for "disease," my understanding is that it's not accurate to refer to the virus as COVID-19. The virus and the disease are not the same thing.
Perhaps it would be more accurate to begin with "In late 2019, a new coronavirus emerged..."