I’ve always had a great time at Disneyland, so it’s sad and unsettling to hear that over 40 of California’s 60 or so cases of measles can be traced to the Anaheim theme park. Apparently there are more people walking around the U.S. who aren’t vaccinated, and at crowded scenes like Disneyland they’re encountering others, including some from overseas, who also haven’t been vaccinated.

But you’re on vacation and preoccupied with fun, so the only potential infection that comes to mind is the musical earworm – a song that gets lodged in your head.

And once you’ve got this in you, it can become a handy device to remember the symptoms to look out for.

It’s a runny nose, its a stale, dry cough
it’s a crimson throat. Every swallow’s tough.
It’s a fever that’s light
And you just don’t feel right
You’ve got mousles after all.

Yes, it’s mousles after all.
Caught it off a castle wall!
Left by Hans from Niedernhall!
It’s a small, small world!

It’s conjunctivitis. You want a nap.
It’s some blotchy rashes that overlap.
Feeling pretty obscene, wish you’d had your vaccine.
You’ve got mousles after all.

You’ve got Mousles after all!
Sat in mucous at Toad Hall.
Shouldn’t be here with y’all.
It’s a small, small world!

What did you bring home from vacation?