OTTAWA –Canada’s Chief Public Health Officer Dr. Theresa Tam says “active” discussions are underway with various countries, including the U.S., to permit the entry of Canadians with mixed COVID-19 vaccine doses.
Tam said the Public Health Agency of Canada (PHAC) has been presenting data to colleagues internationally on the effectiveness of a mixed-dose schedule, such as a dose of AstraZeneca followed by a dose of Moderna or Pfizer.
“Those [discussions] are progressing pretty well. But every country is trying to figure out right now the vaccine requirements, and the U.S. … is just beginning to pull together their policy,” she said, speaking to reporters during a COVID-19 briefing on Friday.
The U.S. Centers for Disease Control and Prevention website currently states that data on the safety and efficacy of a mixed-product series is limited, and that both doses of …