This in part answers some my "Back to fundamentals" post below:
"Scientists discovered that goblet and ciliated cells in the nose have high levels of the entry proteins that the COVID-19 virus uses to get into our cells. The identification of these cells by researchers from the Wellcome Sanger Institute, ..."
Basically, the nose and eyes/teardrop areas are prime entry points for Covid-19. I had not realized this, and previously just assumed that virus went straight to the lungs. News to me, the virus starts replicating right away at first entry points, and apparently spreads from there.