Science DailyImmigrants to Canada who have spent a greater proportion of their lives in Canada have a greater risk of developing multiple sclerosis (MS) than people who have spent a smaller proportion of their lives there, according to a new study. The study does not prove that an increased proportion of life in Canada causes MS; it only shows an association.
likely due to the fact that the higher the latitude you live in, the higher rates of MS. cite
Then presumably the increased chance of multiple sclerosis would apply only to immigrants from countries of a lower latitude than Canada? Granted, this describes most recent immigrants to Canada, but there are still plenty of European immigrants from similar or higher latitude than Canada.