The study and its results have yet to be independently peer-reviewed by other scientists, but could bring the world closer to understanding how vaccines impact transmission.

According to Antoniou, the "majority" of the deliveries for this week are scheduled for Wednesday and Thursday, and those "remain on schedule."

COVID-19 vaccines are a precious commodity during the pandemic, yet some people in non-priority groups have been able to access "leftover" shots.

Residents received their first dose of the Moderna COVID-19 vaccine.

The Middlesex-London Health Unit is confirming the vaccination clinic at the Western Fair District Agriplex will reopen on Monday.

Israel leads the world in COVID-19 vaccinations, inoculating almost 15 per cent of the country’s 9.3 million population in about two weeks.

AstraZeneca has said it believes a first dose of its vaccine offers protection after 12 weeks, but Pfizer says it has not tested the efficacy of its jab after such a long gap.

A ministry spokeswoman said the province is still figuring out how it's going to adjust its vaccine rollout in light of the supply interruption.

The news comes as the Pfizer-BioNTech coronavirus vaccine reduction plan goes into effect, resulting in a vaccine delivery hold-up for Canada during the week of Jan. 25.

Pfizer, however, said that such a proposal would first require approval by the U.S. Department of Health and Human Services.