I've now had at least one of every single Covid vaccine available in Oz. 2 AZs, 2 Modernas, a Novavax and a…

I've now had at least one of every single Covid vaccine available in Oz. 2 AZs, 2 Modernas, a Novavax and a Pfizer. It'd be nice if heterologous protection is an actual thing, anyone know where that thinking is up to?