As we are frequently told, like in cancer treatments, we are all different - and therefore we all react to things in different ways.
Who knows, the AZ vaccine may be well taken up by our little bodies and may turn out to be the best choice, this is very much a guessing game. Other vaccines may not perform as well in some people.
We just have to be grateful that our strong leadership has done as much as they can to prevent Australia being hit badly like the USA, UK etc and that we do have access to some vaccines and sooner rather than later.
Just think, it is all being provided free of charge so everyone has access.
What will be will be and as that is really out of our personal control (unless we stay locked in our homes) and I for one am grateful for what I have been provided.