On April 13th, citing “an abundance of caution,” after the appearance of a few rare blood clots in the brain (cerebral venous sinus thrombosis, or CVST) following administration of the Johnson & Johnson COVID-19 vaccine, the FDA announced a “pause” in its administration. Regulators reversed course just ten days later, after confirming that the incidence of that adverse reaction was, indeed, extremely low, and that the benefits of receiving the vaccine overwhelmingly outweighed the risks.