Some of the more panicky media coverage described all nine cases as breakthrough infections, implying that the virus consistently and repeatedly evaded the vaccine. But that’s not what happened, Paul Offit, director of the Vaccine Education Center at the Children’s Hospital of Philadelphia, told The Daily Beast. “We keep using the word ‘breakthrough’ and that’s the wrong word,” Offit said. Yes, in Nevin’s case, the virus punched through the roughly 70-percent protection provided by the Johnson & Johnson vaccine. Thus Nevin got sick. Either he or the person who infected him carried enough of the virus to pass it along to others. But once the virus ran into the vaccine-juiced immune systems of the eight other Yankees, it hit a wall. The team’s extensive testing and contact-tracing didn’t seem to turn up any more cases of actual sickness. “I’d interpret this to mean the vaccine is working,” Offit said.