Over 1000 general practices across the country will administer the AstraZeneca vaccine as phase 1b of the program starts on March 22.

Appointments will increase as the number of clinics grow from 1000 to more than 4000 over four weeks.

In week one locally, the clinics offering the AstraZeneca vaccine include: Hopkins Medical Centre Warrnambool, Cambourne Clinic Warrnambool, Warrnambool Respiratory Clinic, Gunditjmara Aboriginal Cooperative Limited, Warrnambool Medical Clinic, Kirrae Health Service Purnim, Dhauwurd-Wurrung Elderly and Community Health Service Portland, Active Health Portland, Terang Medical Clinic, Hamilton Medical Group, Corangamite Clinic Colac and Otway Medical Clinic Colac.

They will be in addition to South West Healthcare's vaccination centre on Merri Street where around 40,000 local people will be vaccinated in the next 12 months.

The Therapeutic Goods Administration has declared the AstraZeneca COVID-19 vaccine is safe.

Australia's deputy chief medical officer Professor Michael Kidd said he expected a small number of adverse reactions to the vaccine.

"That's why it is so important that when people receive their vaccine, that they stay and get observed for 15 minutes after the vaccine, so we can make sure they are not going to have one of these reactions," Professor Kidd said.

'[For] the vast majority of people, if they will get a reaction, it occurs in that 15-minute period."

Earlier, March 18: Prime Minister Scott Morrison has admitted the flow of COVID-19 vaccines may not be what the government had wanted but supply is increasing.

Health Minister Greg Hunt said GPs will come online from March 22 and increase to more than 4000 by the end of April as part the next phase of the vaccine rollout to priority groups in the broader population.

"There will be six million Australians in Phase 1b, and not all will be able to be vaccinated immediately," he said.

Some community pharmacists will also participate in the program as the government comes under fire for a slow rollout.

If you want to find out when you will be eligible for the vaccination, take the eligibility test here.

The full list of GP clinics can be found here.

Some clinics are urging people not to ring and book in just yet, as vaccine dosages are limited and booking times might not be able to be arranged.

READ MORE: Explainer: How will the COVID-19 vaccine roll out in the south-west?

"No-one will miss out, whether they live in a city or country town or a very remote area," Mr Hunt said.

"This staged scale up will align with the supply of the locally produced AstraZeneca vaccine, and as more vaccine becomes available more services will come online."

The government initially suggested four million vaccinations would be achieved by the end of March.

However the figure stood at 200,000 on Tuesday.

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Taken to task by Labor leader Anthony Albanese for over-promising and under- delivering, Mr Morrison told parliament of the 3.8 million vaccine doses contracted from overseas, only 700,000 were able to be provided "because of the desperately serious situation that we find in Europe".

The prime minister has promised all Australians will get a first dose by the end of October.

READ MORE: 100 Commonwealth clinics to offer vaccines

Australian-made AstraZeneca vaccines are soon expected to start coming off biotech CSL's Melbourne production line for distribution.

The firm's aim is for one million doses to produced each week and they're in talks with the government to up the pace.

Labor and GPs are concerned the national system to be used for booking shots is not yet operational.

"This is utterly remarkable and irresponsible," Labor's health spokesman Mark Butler said.

"They are being inundated by phone calls to their receptionist asking whether their patients can book with them and they're not able to provide any information whatsoever."

Mr Hunt said people can find a vaccination provider through the new national vaccination information and location service at the Department of Health website.

This will enable people to locate their nearest option and link through to the practice's online booking system or phone number to make the appointment.

The next phase of vaccinations will involve people aged over 70, healthcare workers, Indigenous adults, adults with specified medical conditions and a range of critical workers including defence, police, fire and emergency workers and meat processors.

Meanwhile, medical experts and the medicines regulator are standing by the AstraZeneca jab as safe and effective despite concerns raised in Europe about blood clotting.

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