Editor’s Note: This article first appeared on The War Horse, an award-winning nonprofit news organization educating the public on military service. Subscribe to their newsletter.When the COVID-19 vaccine was released in 2020, Daniel Pendergast was intrigued.“I honestly thought it sounded kind of ingenious at first,” he said.But then he learned there was a very small chance of heart inflammation that could occur after vaccination in healthy men like himself: around eight cases per million, according to the U.S. Food and Drug Administration. For Pendergast, 44, whose family has a history of heart disease, even that low risk felt too high.…