Maverick doctors, scientists, and public health officials took charge of the fight against Covid-19 when the CDC and the Trump administration failed to act, according to this illuminating rehash of recent history. Lewis (The Fifth Risk) spotlights a group of doctors who overcame bureaucratic inertia and conventional wisdom to write the U.S.'s pandemic response plan in 2007, after President George W. Bush read a history of the 1918 Spanish flu pandemic and asked what the government would do in such a scenario. Carefully reinterpreting data from 1918, Veterans Affairs official Carter Mecher and other group members developed a "Swiss Cheese strategy" of multiple social interventions (school closures, bans on group gatherings, etc.) layered on top of one another to contain a disease outbreak until a vaccine could be developed. In January 2020, Mecher used sketchy, incomplete data emerging from China to forecast the spread of Covid-19 in the U.S., and shared his findings with California deputy chief health officer Charity Dean, who eventually convinced Gov. Gavin Newsom to issue the country's first statewide stay-at-home order. Though the book's first half is somewhat slow-going, Lewis draws vivid profiles of Mecher and Dean, in particular, and litters the narrative with lucid explanations of epidemiology, disease modeling, and genomic sequencing. Readers will be aghast that these experts weren't leading the battle from the start. (Apr.)