You should preface this by saying this is your unsupported opinion.Basically get a 3jab but the 3rd should be different.
and Todays presser confims
"The state <Vic?>is receiving 88,000 doses of the vaccine on Sunday, which are being redirected from community pharmacies."
So people obviously failing to use the pharmac_ channel; in Vic, hence need to have Moderna at state hubs.
Hopefully other states will now be afforded the same privilege of having Moderna in the very popular hubs.
(Not directed at @drron)leads to higher antibody levels
But have you read the studies from the UK where the AZ has a better T cell response than Pfizer.A good article in the FT but it is behind a pay wall unless you have a subscription.But mentioned here.(Not directed at @drron)
Don’t forget there are 2 branches to the immune system - T and B cells.
Antibodies are produced by descendants of B cells (humoral mediated immunity)
T cells are also important. There are a variety - helper T, memory T, killer T (cell mediated immunity)
B &T work together in a complex interplay
Both antibody and T cell response re Covid Vax have been shown to improve with 3 rather than 2jab.
Studies in Spain and Canada seem to show the improvement is better when mixed and matched. Israel on the other hand only using one type for its 3jab also showing improvement.
Getting that per cent or two past 80% gives confidence that 80% fully vaccinated will be reached too. Hopefully within a few weeks or so that first dose figure is pushing up towards 90%.Vic is now at 81.5 % First Dose and 51.5% Second Dose.
A few other technical papers also suggest that too - at the 1Jab level.But have you read the studies from the UK where the AZ has a better T cell response than Pfizer.