*In the last week or so, I heard about a ton of friends and acquaintances who felt really sick really quickly, were absolutely convinced they had Covid-19, scrambled to find a test, and then to their surprise tested negative. One possibility is that because of the vaccinations, some people’s bodies are now really ready to react to any pathogen, and so they’re responding to the common cold or the usual bugs with more intense defenses — more post-nasal drip, higher elevations of body temperature, more coughing, more sneezing, etc. Another possibility is that the mask-wearing and social distancing of 2020 that almost wiped out the usual flu season gave our bodies less practice of fighting off pathogens, and so that now that we’re encountering the usual winter bugs and colds again, our immune systems are jumping to Defcon One.