The only cells it really infects are what we call respiratory epithelial cells, a one-cell layer of cells that kind of protect the breathing tubes and the lungs, all the way down to the bottom, where we have air sacs.
But what perfectionism doesn't tell us is that soon after reaching that summit, we will be called down again to the fresh lowlands of insecurity and shame, just to try and scale that peak again.
Plankton need nutrients, but most nutrients are locked in the deep, denied access to the surface by a layer of water called the thermocline, around 200 metres down.