Fair question Tully,IMcase once you have had the first "jab" the reasoning behind having the first jab, in my case anyway, was its an insurance policy so if you don't get the second you are only half way there. I know of a few (2)people that have had the Phizer dose and had a fairly big reaction to the second jab, this reaction lasted less than an hour and was gone after that, however I also know may people that have had either AZ or Phizer and had virtually no reaction, maybe it's you body signalling that your immune sysrem is less than exemplary if you have a reaction. I also (IMO) think that some report a reaction, wheter real or not in case there is compensation on offer, the people that I know that had a reaction was well before compensation was mooted. one I think was AZ one was Phizer.
