Over the last three decades, the incidence of autism spectrum disorder, better known simply as autism, has risen dramatically in the U.S., from approximately 1 in 1,000 children to 1 in 110, arousing widespread concern among parents and psychiatrists alike. A few of the many potential possible culprits scientists have targeted are faulty genes and thimerosal, a mercury-laced preservative in vaccines. Former Newsweek senior journalist Mnookin focuses his masterful investigative skills primarily on the latter, highly controversial possibility, illustrating how the current, misguided anti-vaccine movement can be blamed almost equally on panic-driven parents, sensation-hungry media, and PR-challenged health authorities. In making his case, Mnookin covers a wide swathe of medical history, from polio outbreaks to the scare tactics of fringe British researcher Andrew Wakefield, who first forged the dubious vaccine-autism link. While Mnookin dismantles this link convincingly, his argument that multivaccine cocktails have been proven safe is ultimately less persuasive. Still, he’s an able, engaging wordsmith, and this cautionary tale about misinformed medical alarmism is thoroughly compelling.