For now, the UK will continue with its age-based prioritisation, but there's a case for key workers and the socially disadvantaged to start feeding into the vaccine queue.
Tamara Dus, director of University Health Network Safety Services, administers a Pfizer-BioNTech COVID-19 vaccine in Toronto.
THE CANADIAN PRESS/Frank Gunn
The arrival of COVID-19 vaccines has raised hope for an end to the pandemic. Hopefully that's true, but there are variables. Here are some factors that could affect the success of the vaccine rollout.
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.
Health workers are preparing COVID-19 vaccine Sinovac during first stage vaccination in Health Center, South Tagerang City, Indonesia, Januari 15, 2021. More than 8.000 health workers there are vacinnated.
By prioritising vaccination for the elderly, Indonesia may optimally reduce the hospital burden and COVID-19 deaths amid a limited vaccine supply during the first vaccination phase.
The campaign shows promise. But it's not clear if it will preempt and respond to people's concern about vaccine safety.
Joe Biden, then president-elect, received his COVID-19 vaccination in December.
Joshua Roberts via Getty Images
The COVID-19 vaccine rollout has fallen far short of President Trump's promises. President Biden says he can fix that. Can he?
A pharmacy manager at CVS Health in Massachusetts prepares to administer vaccines at a veterans center.
Two pharmacists involved in COVID-19 vaccine preparation explain the role pharmacists are poised to play in expanding vaccine access.
Elementary students initially received polio vaccines at school.
PhotoQuest/Archive Photos via Getty Images
Massive vaccine distribution efforts take a lot of coordination. The rollout of the Salk polio vaccine in the US in 1955 holds lessons for those delivering COVID-19 shots today.
Seniors in Fort Myers, Fla. wait for their COVID-19 vaccinations. At this site, 800 doses of vaccine were available.
Octavio Jones via Getty Images
The shipment of goods to suppliers has become technologically sophisticated. Delays in getting out the COVID-19 vaccine to people show that the breakdowns come down to something more basic.
Australia's expedited plan to start dishing out COVID jabs in mid-late February will call for NASA-like logistical organisation. And ideally, no more clusters of infections to distract frontline workers.