Bottom line is that we don't know the full side effects of these vaccines, and we won't for at least a couple of years.

On that note, new details are emerging of the Pfizer Vaccine effects - specifically from the second dose:

ABC: Dr Caldicott says he was rather surprised by the strong reaction, because ordinarily he doesn't feel unpleasant after getting vaccinated.

"As an emergency doctor, you don’t want to look weak. I was very relieved to find out many of my colleagues were feeling the same thing … I've had colleagues of mine that have had to take time off work."

Prof Nikolai Petrovsky, Flinders University: "This came out in their phase three clinical trials — it was very clear that there were very high numbers of severe reactions after the second dose. In reality, we don't understand what causes it."

Petrovsky has bobbed up a few times - he's one of the rare experts who tells it as it is.

In Australia there are only two choices: AZ - which doesn't work against variants -
or Pfizer - which causes unexplained 'severe reactions'.