Canada’s health regulator approved Pfizer’s kid-size Covid-19 shot on Friday and announced it will allow Canadians returning from short trips abroad to use a quicker, less-expensive test for the coronavirus. Health Canada authorized the shots for children ages 5 to 11. And as in the US, the doses will be just a third of the amount given to teens and adults.
But Canada’s National Advisory Committee on Immunization has suggested that the country’s provinces, which administer health care in the country, offer the two doses at least eight weeks apart. Canada had problems getting vaccines into the country early this year and delayed a second dose for adults until more supply came in, but Canadian officials say delaying a second dose provides better protection. “A longer interval between doses leads to stronger immunity,” said Howard Njoo, the deputy public health officer of Canada.