Australia's second phase of the coronavirus vaccine rollout is expected to begin in late March, pending delays with supplies overseas.
It's believed around six million people are included in the next round of the vaccination program, including Australians aged over 70.
The first vaccine doses available in Australia will be the Pfizer jab, with those in line to include anyone who lives or works in aged care, hotel quarantine or frontline health.
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© APA nurse holds a bottle of the Pfizer-BioNTech COVID-19 vaccine at the Nurse Isabel Zendal Hospital in Madrid, Spain, Monday, Feb. 1, 2021. (AP Photo/Bernat Armangue)
That first round of vaccinations is expected to begin in late February.
The Therapeutic Goods Administration (TGA) has given the Pfizer vaccine provisional approval and dozens will be shipped to Australia from Europe later this month at a rate of 80,000 per week.
But Prime Minister Scott Morrison says the exact arrival dates will depend on supply and shipping issues being experienced overseas.
Infectious diseases physician Dr Paul Griffin said Australia will most likely experience some form of delays during the vaccine rollout.
© APThe vaccine rollout has begun in Canada, but only for those deemed high-priority.
"That's part of the reason we do need to plan ahead and that's why we have some contingency with three different vaccines," Dr Griffin told Today.
Video: Pharmacists to give Astrazeneca vaccine (Sky News Australia)
Pharmacists to give Astrazeneca vaccine
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"We know the demand has been incredible and some countries have had difficulties getting the supplies.
"We have a number of different vaccines, one of which can be made in Australia. Hopefully our rollout won't be significantly undermined by supply issues. But it's hard to know."
The TGA has also moved to reassure the public the vaccine is safe for those over 70, approving it for use for people in that age bracket.
"We know these approvals are based on evidence, as we get more and more data it is safe and effective in that population," Dr Griffin said.
"To see it added in that age group is obviously really good news, particularly given they're a group that are particularly vulnerable with this infection."
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When asked by 9News when the first shipment of the Pfizer jabs were due, the pharmaceutical giant did not answer but did say it was committed to supplying 10 million doses during the course of 2021.
From March, the broader rollout is expected to use the AstraZeneca vaccine, which can be stored at regular refrigeration temperatures at GP clinics and pharmacies.