加拿大疫苗接種緩慢，政府稱已經從7家疫苗生產廠商購買了四億疫苗！

我又不懂了，加拿大不是和美國一樣到目前隻批準了輝瑞和莫德納嗎？

提前買了J&J，牛津？不會買俄國、中國、印度的吧？

加拿大人口也用不了四億疫苗吧？

To make good on that promise, Canada says it has purchased nearly 400 million doses from seven vaccine manufacturers. To date only the Pfizer-BioNTech and Moderna vaccines have been authorized for use in Canada.