Ah, 1 in 100 have rheumatoid, which would be about 1% of the population of Canada. About .3% have AS.
However, if only between .25% and 1.25% of the world's population have it, you might not see people who have AS every day. Depends where you live, I'd guess. Granted, if the people who have AS really do tend to be in the northern and southern hemispheres, with very little around the equator, that narrows the odds of meeting someone on the street who has AS. I have done that, actually. It's pretty easy to spot in some men and over the past 8 years, I'd estimate I've met/seen probably 10 people with AS, as I go through my work day. And you might not recognize if someone has AS. So many of us show no visible physical signs.
Warm hugs,
