Public health experts have said no US state has so far come close to using up its federal allotments of vaccines.

"From three to four thousand people a day dying is just beyond the pale". State and local public health authorities will have to junk some plans and draft others. "We're going to continue working to see if we can get a few more doses, because all Canadians want this to move forward as quickly as possible". "We've got to get it to pharmacies, get it to community health centers".

One change will have some teeth to it. Azar said going forward the federal government will base each state's allocation of vaccines partly on how successful states have been in administering those already provided.

Health officials at the state and federal level have scrambled in recent days to step up vaccination programs that had given shots to only 9.3 million Americans, as coronavirus infections remain at record highs in many USA states 12 days into the new year.

Although Azar said the shift in strategy was a natural evolution of the Trump administration's efforts, as recently as Friday he had raised questions about whether Biden's call to accelerate supplies was prudent. The Trump administration, which directed a crash effort to develop and manufacture vaccines, is hoping to avoid a repeat of earlier debacles with coronavirus testing.

The slow pace of the vaccine rollout has frustrated many Americans at a time when the coronavirus death toll has continued to rise. More than 376,000 people have died, according to the Johns Hopkins database.

On Monday, the federal government published a delivery schedule outlining the amount of vaccines being distributed to provinces each week between now and the end of February so that each region can plan accordingly and schedule an appropriate number of vaccination appointments for prioritized groups like front-line health workers and seniors in long-term care comes.

"We're in a race against this virus and quite frankly, we're behind", Adams told "Fox & Friends". "The good news is that 700,000 people are getting vaccinated every single day". Then between June and September, the plan is to vaccinate almost 20 million more people, seeing Canada hitting and surpassing the herd immunity threshold.

The Trump administration announced today it would no longer hold back the required second doses of the Pfizer and Moderna vaccines, a move that will essentially doubling supply.

The vaccine - developed by the company's Belgian division, Janssen Pharmaceutica - differs from the Pfizer and Moderna vaccines, which use mRNA technology.

This new, gene-based technology has proven effective in the development of the coronavirus vaccine developed by Pfizer and BioNTech in addition to the one created by Moderna.