Here’s another odd fact pattern. The public-health consensus around COVID-19 and the proper or necessary interventions to take against it shifts all the time. This consensus shapes public policy and leaks out into respectable mainstream news outlets; most insidiously, it becomes encoded as a quasi-official public line that every individual on social media is obliged to repeat and share or else be subject to demonetization, warnings, censorship, and accusations of spreading disinformation. The polarization of our politics and of public-health elites has left us with two categories of thought on COVID: the Science, and dangerous (sometimes racist) conspiracy theories. Half the time, the conspiracy theories become the Science. Belief in the efficacy of masks or in the lab-leak theory made these transitions. But these shifts don’t happen upon the publication of credible new scientific studies. There is almost no public jousting and argument among scientists and researchers. There is just a sliding from one position to another when it becomes safe. Long after these shifts take place, CDC guidance often comes to incorporate them.