Full CoverageMixing Covid jabs has good immune response, study finds
By Michelle Roberts
'I do not want under-40s to get AstraZeneca': Queensland's Chief Health Officer rejects PM's comments on COVID vaccines
By Stephanie Zillman
Sydney in lockdown, borders shut and hardly anyone vaccinated. How long can Australia go on like this?
By Angela Dewan
A third dose of the AstraZeneca vaccine is found to boost immune response. (Published 2021)
By Rebecca Robbins
Vaccine Mix Study Suggests Combinations Safe and Effective
By Denise Roland & Jenny Strasburg