Pfizer's Global Supply facility in Kalamazoo, Michigan. Vaccine doses will begin leaving the Pfizer factory in Kalamazoo on December 13. AFP Photo
Pfizer's Global Supply facility in Kalamazoo, Michigan. Vaccine doses will begin leaving the Pfizer factory in Kalamazoo on December 13. AFP Photo

US Covid-19 vaccination programme begins with guarded truck convoys from Pfizer factory