AstraZeneca clotting concerns do not affect those currently eligible for the jab06/04/2021|4min The Grattan Institute's Stephen Duckett says the blood clotting concerns about the AstraZeneca vaccine which are under investigation do not affect those who are currently eligible for the jab in Australia. “The only question about AstraZeneca is in younger people and we’re not at that stage of the rollout yet, so it’s actually not a reason why people who are eligible this minute shouldn’t go and get the AstraZeneca,” he said. “The issue is going to be it’s really complex … how you measure whether there’s an excess rate of these clots or whether it’s just the normal rate.