COVID Booster: mixing and matching boosters, delayed surgery, and testing recalcitrant children

Five things we learned about COVID-19 this week.

purple worm-like forest of cell wall with small orange SARS-CoV-2 particles covering the wall
A scanning-electron microscope image of SARS-CoV-2 emerging from the surface of a cell. Credit: NIAID // Image captured and colorized at Rocky Mountain Laboratories in Hamilton, Montana.