Dr. KJ Seung, a professor at Harvard Medical School, speaks at a September rally outside the home of the CEO of Moderna, maker of one of the two mRNA vaccines that prevent COVID-19. The fake bones are meant to represent lives lost unnecessarily to the coronavirus. Seung was part of a group of doctors demanding Moderna share vaccines — and its recipe — with low-resource countries. (Jasper G. Goodman/The Harvard Crimson)