How worried should you be about AstraZeneca?

Australia's vaccine strategy was already in trouble, but in the past few days things got worse. The AstraZeneca vaccine at the centre of our rollout is now no longer recommended for anyone under 50, while the only alternative currently in production, Pfizer, can only be made overseas. So how much trouble are we in? Today on The Signal, we give you the A to Z on AstraZeneca. How big is the blood clot risk? Has Australia made the right call? And how big a hole does this blow in the roadmap back to normal? Featured: Dr Kylie Quinn, Vice Chancellor's Research Fellow, School of Health and Biomedical Science, RMIT University, Melbourne

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