There's an alert out for measles across the country. The CDC says so far this year, there are 58 cases in 17 states. That equals the number of cases reported in all of 2023. Once eradicated, the CDC is stressing families to make sure they get their measles vaccines. Doctors say, on average, one infected person infects 12 to 18 unvaccinated people. The airborne virus can linger in the air long after someone leaves a room.