San Diego County health officials have issued a warning about “dark times” ahead as more measles cases are confirmed in Southern California. While there has yet to be a case of measles in the county in 2026, neighboring LA and Orange County have confirmed cases and officials there are urging parents to vaccinate their children. Measles, the world’s most contagious disease, was declared eradicated in America in 2000, but health officials say with vaccine hesitancy, it is slowly making a comeback,