TORONTO (AP) — Prime Minister Justin Trudeau said Tuesday that Canada is contracted to receive up to 168,000 doses of the Moderna COVID-19 vaccine before the end of December, pending approval by Canada’s health regulator.

Trudeau said deliveries could begin within 48 hours of regulatory approval and health officials said they expect to approve use of the Moderna vaccine soon.

Canadians began receiving vaccine shots developed by Pfizer and BioNTech on Monday and Trudeau said Canada expects to receive about 200,000 doses from Pfizer next week. Canada received an initial batch of 30,000 this week.

Trudeau said they will have 70 sites ready to administer these doses next week, up from 14 sites this week.

The U.S. Food and Drug Administration said its preliminary analysis confirmed the effectiveness and safety of the vaccine developed by Moderna and the National Institutes of Health, bringing it to the cusp of U.S. authorization. A panel of outside U.S. experts is expected to vote to recommend the vaccine on Thursday, with a final FDA decision coming soon thereafter.

Moderna’s vaccine is the same type as Pfizer’s, made with the same technology. In scrutinizing early results of a 30,000-person study, the FDA found it also worked just about the same.

The Moderna vaccine was more than 94% effective overall at preventing COVID-19 illness, and 86% effective in people 65 and older. The FDA uncovered no major safety issues.

Trudeau noted the Moderna vaccine does not need some of the extra special handling requirements of the one from Pfizer, including ultra cold freezers.

“That makes it a better option to ship over long distance to remote areas so doses of this vaccine will be directed to the north as well as remote and Indigenous territories,” Trudeau said.