Just did my Class 1, and no change in blood pressure from pre vaccines.
Israel now reports a sharp increase of Delta Covid cases. They have the highest % of vaccinated in the world. The majority of cases are in the unvaccinated part of the population, so the vaccines do work. They do however have a lower protection against serious disease (about 40%) if you are vaccinated and get infected with the Delta strain.
I predict a tough year ahead for Australia.