If your parents didn’t vaccinate you or if (like in my case) the vaccine didn’t exist when you were a kid, go get the MMR shot.

Also, if you were born between 1964-1994 in Australia you probably only had one dose if you did have the vaccine, so you should get a booster as an adult (since 2 doses is the general recommendation for lifetime protection).

See: https://www.health.nsw.gov.au/Infectious/measles/Pages/measles-vax-qanda.aspx