More than half a million Australians have now been vaccinated against COVID-19, with the rollout boosted by the AstraZeneca vaccine manufactured in Melbourne. The first of 50 million Australian-made AstraZeneca doses have been distributed and more will be on an ongoing basis, Health Minister Greg Hunt said. He said the decision to produce the vaccine at CSL has ensured Australia is one of the few countries with “strong, clear” domestic supplies going forward. More than 507,000 Australians had now been vaccinated as of Friday—329,000 vaccines administered in state and territory vaccination clinics, 97,000 in general practices and more than 80,000 in aged care homes, Hunt said. “Our GP’s have played a vital role in this expansion and have not only been vaccinating over the week, but many practices are continuing to vaccinate on Saturday and Sunday this weekend,” he said in a statement on Sunday. Meanwhile, health authorities in Queensland …