Australia received 300,000 doses of the AstraZeneca PLC vaccine on Sunday, more than doubling the amount of all vaccines shipped to the country so far and allowing the government to ramp up its COVID-19 immunization drive.

Axar.az reports that mass vaccinations for Australia’s 25 million people began on Monday after the arrival of the first batch of more than 142,000 doses of the Pfizer Inc and BioNTech SE vaccine.

Up to 4 million Australians are expected to be inoculated by March, with Morrison being among a small group receiving the first round of the Pfizer/BioNTech vaccine.

Most people will be vaccinated with the University of Oxford/AstraZeneca vaccine. The weekly number of administered doses is expected to reach 1 million by the end of March when CSL Ltd begins to locally produce 50 million of the AstraZeneca doses.