A three-part series from This American Life producer Nancy Updike. When Rachel McKibbens’s father and brother died suddenly last fall, two weeks apart, from Covid, she’d had no idea her father was sick, and no idea her brother was dying. They were unvaccinated, but the story of what happened started long before that. All three episodes of "We Were Three," a new show from Serial Productions and The New York Times, are available now wherever you get your podcasts.