Los Angeles Int'l, and Richmond Int'l in Virginia.

Before 1989, per the CDC:

"However, many people who received the measles vaccine between 1963 and 1989 likely would have received only one dose, which puts them at increased risk of contracting the disease. Those who were vaccinated before 1968 with inactivated measles vaccine or measles vaccine of unknown type, in particular, should receive at least one dose of live attenuated vaccine. "This recommendation is intended to protect those who may have received killed measles vaccine, which was available in 1963-1967 and was not effective," the agency noted on its website."

When the 60's measles vaccine was cast into doubt in the mid-1980s, I got a booster shot. When I was assigned to the Pacific during a measles outbreak, I got a titre test, which indicated the shot(s) took.

Anyone who got a single shot in the 60s through the 1980s should get either checked out with a titre test, or get revaccinated if medically feasible.

Workers don’t pass through, they stay for however long for that day, being exposed and reexposed. But nobody ever seems concerned about this. Every article I read, concern for passengers is the only thing emphasized.