Measles outbreak: man who died in Swansea was infected, lab tests reveal

[drmeow]

19. According to the CDC

Measles, mumps, rubella (MMR) vaccination

Adults born before 1957 generally are considered immune to measles and mumps. All adults born in 1957 or later should have documentation of 1 or more doses of MMR vaccine unless they have a medical contraindication to the vaccine, or laboratory evidence of immunity to each of the three diseases. Documentation of provider-diagnosed disease is not considered acceptable evidence of immunity for measles, mumps, or rubella.

Measles component:

A routine second dose of MMR vaccine, administered a minimum of 28 days after the first dose, is recommended for adults who
are students in postsecondary educational institutions;
work in a health-care facility; or
plan to travel internationally.
Persons who received inactivated (killed) measles vaccine or measles vaccine of unknown type during 1963–1967 should be revaccinated with 2 doses of MMR vaccine.

I think I got a single MMR shot (although maybe I got two) before going to grad school cause I couldn't show proof that I'd been immunized and I was tested about 10 years later and had demonstrated immunity.

I've never seen anything that says that immunity goes away for ALL of the things we're vaccinated against - Some definitely (i.e., tetanus, diphtheria, and the flu ... - and a one time adult polio booster is recommended) but many of the others require a single or single series of shots.