Case builds for mixing COVID-19 vaccine doses
It looks promising, but the evidence is not there yet, expert says
![Associate Professor Paul Griffin](https://images.media.ausdoc.com.au/wp-content/uploads/2022/08/25212013/Griffin_Paul_HealthPagesWiki-4.jpg)
Australia will eventually move to a heterologous COVID-19 vaccination regimen if the evidence firms up, a leading infectious diseases specialist predicts.
Associate Professor Paul Griffin has responded to the weekend news that Canadian health authorities have recommended people who have received a first dose of AstraZeneca’s vaccine should have an mRNA shot as their second dose.