Yup, Yellow Fever is still in short supply here (the vaccine, not the thing with Asian gir...nevermind)
Tried getting it last year before going to Brazil, I was told I could get a "half dose" that was somewhat effective....eh, I just decided to forgo it.
You can only get it at certain clinics as well:
https://www.canada.ca/en/public-heal...-columbia.html