It comes as US President Joe Biden said before leaving for the G7 summit in Cornwall that he would be announcing a vaccine strategy for the world.
The move by the USA government could lead to 200 million BioNTech/Pfizer doses being sent worldwide this year, followed by another 300 million across the first half of2022, according to the individuals familiar with the plan.
The administration of President Joe Biden is buying 500 million doses of the Pfizer-BioNTech Covid-19 vaccine to distribute among other countries, United States media reported Wednesday citing people familiar with the matter.
As Mr Biden embarks on his first foreign trip, he is aiming to show "that democracies are the countries that can best deliver solutions for people everywhere", Mr Sullivan said. "We're going to be the "arsenal of vaccines" over this next period to help end the pandemic".
The Washington Post first reported the plan.
He then assured that LGUs identified as centers of gravity or those with a high number of active cases will be given their supply this week with the arrival of 3.2 million doses on Thursday.
The announcement comes days after the White House unveiled its plans to begin sharing the existing US vaccine surplus with the world.
The Saskatchewan Health Authority made the announcement on Wednesday, saying it's accelerating access to second doses and adding more appointments to the patient booking system.
The White House and Pfizer declined to comment.