COVID-19: Fourth vaccine dose highly recommended but not mandatory

Another 7.5 million Australians can get a fourth dose of a COVID-19 vaccine with everyone over the age of 30 now eligible. The timing of expanded eligibility is no coincidence. There's a new Omicron sub-variant - B.A5 - and it's threatening to become dominant. Health Minister Mark Butler says it's proving to be a tricky adversary.

Two people receive a dose of the vaccine against Covid-19. Source: AAP Image/EPA/Alberto Valdes

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