Vaccine compulsion in the 1980s also hardened opposition to vaccination. — via healthing_ca
required immunization for school attendance. In 1979, as rates in the U.S. continued to fall, Canada experienced a significant outbreak with over 20,000 infections across the country. But vaccine mandates were not the only reason why measles rates were falling more rapidly in the U.S.more than 90 per cent of children were immunized by the time they went to school
In the early years of the measles vaccination program, a killed virus was often used, but this turned out to be less effective than the live virus. Also, physicians often administered half doses of the live vaccine to conserve the supply. The killed virus vaccine was only used in the U.S. for one year, but it was used in Canada for four years, particularly in Ontario and Alberta.infected with the measles had a documented history of being vaccinated against the disease.
Ontario vaccination rates against measles, mumps and rubella are very similar to national averages, but Ontario children are slightly more likely to be vaccinated against tetanus , and pertussis, popularly known as “whooping cough” .by the C.D. Howe Institute argued that relatively few parents are actively opposed to vaccination. Instead, “barriers to access, complacency or procrastination” are more important.
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