An international traveler to Colorado has tested positive for measles. The adolescent arrived at Denver International Airport on Dec. 13 and visited several counties in the state in the past week.
Arapahoe County Public Health is leading the investigation with state and other local public health agencies to notify those who have been directly exposed.
The adolescent arrived at DIA on Dec. 13 and there could have been possible exposures in the A Concourse, bridge security or baggage claim from 4:30 p.m. until 8 p.m. on that day.
The patient then went to the emergency department at Children’s Hospital Colorado on Monday morning. The adolescent has an unknown vaccination status and has been in isolation since Dec. 18.
The last confirmed case of measles in a Colorado resident was January 2019.
To be perfectly fair, most people who were vaccinated as children are now vulnerable again as adults, and would need to be revaccinated. Most people don’t know this. When there was a measles outbreak in Brooklyn, where I live, because of all of the unvaccinated children there, I had to go see my doctor and get the MMR vaccine again Because my vaccination had worn off. 
Any adults who have not been revaccinated should avoid unvaccinated children until they can get the MMR vaccine again.
Mine had worn off or hadn’t stuck. I only noticed because I was getting travel vaccines and they offered to “double check” everything for peace of mind (it was free or low cost at my doctor’s office).
Yeah, if you got it as a kid, it will wear off sometime in your mid to late 20s
It’s not true that most people lose their immunity. Some do. But yes, if you’re in, say, your 30s or older, it’s best to get a titer to check if you still have antibodies to fight measles.