Herd immunity is the percentage of people who need to be immune to a disease, most typically through vaccination, in order to prevent the spread of an infection.

Serum Institute of India said the blaze would not affect production of the COVID-19 vaccine.

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.

Michael Nickerson, business agent for the International Union of Operating Engineers, says accessibility continues to be an issue for paramedics trying to get the vaccine.

Shortages of COVID-19 vaccine supply have left provinces, including Alberta, scrambling to adjust their rollout schedules, including plans for second doses.

Some health unit services have been impacted due to the redeployment of staff to assist with the COVID-19 emergency response.

Interior Health said it has already administered more than 14,000 doses to priority groups.

Haliburton, Kawartha, Pine Ridge District Health Unit is expecting vaccines to arrive in early February.

A Pfizer spokeswoman said use of the vaccine on pregnant women is "a health regulatory organization's decision."

The City of Toronto says it has been ordered to 'immediately' pause its COVID-19 immunization clinic at the Metro Toronto Convention Centre due to a lack of vaccines.