A mural in Rome depicts a white dove parachuting vials of COVID-19 vaccine. Several COVID-19 vaccines are based on a viral vector developed by Canadian Frank Graham decades ago.
(AP Photo/Gregorio Borgia)
Viral vectors are modified viruses that trigger an immune response without causing infection. The vector that’s used in several COVID-19 vaccines was created decades ago by Canadian Frank Graham.
One of this and one of that might be a good strategy to coronavirus vaccination.
SOPA Images/LightRocket via Getty Images
Various companies use different ingredients and different delivery systems in their COVID-19 vaccines. Researchers are investigating whether it’s better for individuals to mix what’s available.
A health-care worker prepares a dose of the Pfizer-BioNTech COVID-19 vaccine at a UHN COVID-19 vaccine clinic in Toronto on Thursday, January 7, 2021.
THE CANADIAN PRESS/Nathan Denette
Behind Canada’s current COVID-19 vaccine shortage is a decades-long tale of unheeded warnings, missed opportunities and dismantled resources that was never going to end well.
China could be in pole position to develop a vaccine.
EPA