pfizer had 2 factories to start with:   s/shot_of_a_lifetime_how_two_pfizer _manufacturing_plants_upscaled_to_p roduce_the_covid_19_vaccine_in_reco rd_time and they made 625,000,000 doses the first year.   vid-19/vaccinemanufacturing which would be 9.9095 years at one vaxx per second made.
Canada