Reading some of the posts about those over 50 cancelling their second jab of AZ and wanting pfizer is there any medical reason this is not advisable. I am assuming that those going down this path would still require x2 pfizer. It seems to be happening overseas but not approved in AU. Is there any issues with mixing the vaccine's.
1/ Well note that if an individual delays their second AZ dose to try and get Pfizer, that they may have to wait some time for it, and so that places then places that person at risk for longer. Especially with the newer strains like Delta where the research is showing that you really need to have two doses of AZ/ Pfizer/ Moderna to be well protected, and not just your first dose. For the earlier strains just a single dose a higher lever of protection, than with Delta. It also places others in the community at risk for longer.
2/ From what I have read, you do not need to still get two doses of Pfizer, to replace the second dose of AZ. Just the one. But note with eother AZ/Pfiser, Pfizer/Pfizer or AZ/A that you will probably needa booster in 2022.
OTTAWA -- The National Advisory Committee on Immunization (NACI) is now recommending that people who received a first dose of the Oxford-AstraZeneca vaccine receive a second dose of an mRNA vaccine, such as Pfizer-BioNTech or Moderna.
NACI’s latest advice takes into consideration the most recent evidence on the rare instances of blood clots associated with the AstraZeneca shot and the increase of mRNA vaccine supply arriving on Canadian soil.
It also says it reviewed emerging evidence “suggesting better immune responses” when an individual receives a first dose of AstraZeneca and a second dose of an mRNA vaccine.
Personally I will get my second AZ as soon as I am eligible for it, and then seek my Moderna Booster in 2022 as soo as I am eligible for it. I would anticipate that this will also see me get the booster earlier than if I try and wait fora second dose by Pfizer.
3/ Vaccination works by the community as a whole acting. The community will benefit most if all individuals who can get AZ (and yes for Pfizer too) do so as quickly as possible.
This in turn means that the risk for all individuals will be less.
The sooner we as a nation get our vaccination rate up, the better off we all will be. Medically, financially and socially.