As soon as the kids went back to school in my small town, the lineup at the healthcare centre for COVID-19 testing grew exponentially. As per usual for September, many kids had the sniffles--thankfully, none of it turned out to be COVID-19. This made me wonder: why are colds spreading so rampantly?? Does this mean the procedures for preventing disease transmission are failing? Should I be worried? My answers in Nature today: https://www.nature.com/articles/d41586-020-03519-3 It turns out that pandemic response measures (masks, social distancing and increased handwashing) are quite good at clamping down on flu, covid, and other respiratory diseases--but not some common colds. Common colds are in the majority caused by 4 common coronaviruses (the same family as the novel coronavirus) and/or hundreds of known rhinoviruses. Rhinoviruses are different beasts. They don't rely on external lipid envelope for protection like coronaviruses do, and that envelope is what soaps and sanitizers b...