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- Global National: Jan. 27, 2021 | Pfizer seeks to stretch number of doses in COVID-19 vaccine Global News
- Pfizer presses Health Canada to increase doses of COVID-19 vaccine taken from each vial The Globe and Mail
- COVID-19 vaccine shortage forces provinces to rethink rollout CBC News: The National
- The knowns and unknowns of COVID-19 vaccines | TheHill The Hill
- U.S. Needs 500 Million Doses to Vaccinate Everyone 16 and Older Bloomberg
- View Full coverage on Google News











