Prime Minister Scott Morrison and state and territory leaders have agreed on Monday to bring forward the AstraZeneca vaccine rollout for Australians over 50 and use mass vaccination centres for the rest of the population before Christmas. Due to the AstraZeneca vaccine’s rare but serious link to blood clots, Pfizer is now the recommended coronavirus vaccine to people under 50. The federal and state governments have agreed to use increased supplies of AstraZeneca vaccine for Australians over that age, with the revised vaccination plan to be outlined in detail on Thursday. “There are strong, strong arguments for the bringing forward of over 50s with the AstraZeneca vaccine, which is a safe and effective vaccine for those aged over 50, and particularly important for those aged over 70 who are already in that priority group,” Morrison said ahead of the National Cabinet on Monday. The Prime Minister also hoped to vaccinate people under 50 …