Cases of measles have skyrocketed in South Carolina, the state facing the largest outbreak in the country as it spreads to three other states. Health officials said that 124 cases were diagnosed since Tuesday, bringing the total to 558 since the outbreak began in October. “We have lost our ability to contain this with the immunity that we have,” Dr. Helmut Albrecht, an infectious disease physician, said in a press conference. “It’s going to get worse before it gets better.” Measles is one of the most infectious diseases on the planet, and the outbreak is centered in Spartanburg County, where...