My wife and I have had our COVID AZ vaccinations.   My wife felt cold and ill the next day and off her food, and she had a large red and sore area on her arm a few cms below the injection point for more than a week afterwards.

I had virtually no reaction to it at all.  No soreness at all, not that hungry the next day, but I expect that I was empathising with my wife.

1.  What is the body reacting to in the AZ vaccine?  With no real virus being injected, is it the body’s marshalling of the antibodies which makes us feel so ill?   The AZ vaccine uses a modified monkey flu virus I believe, is it this virus which attacks our bodies that makes us feel ill?

2.  As I had no real reaction to the vaccination, is my immune system primed for a real SARS attack as well as my wife’s?

3. When we get the second dose, can we expect the same reaction for both of us as we got before?

4.  Two people I know had their vaccinations two months after they caught the real Covid virus and were both ill for two weeks.  They had a similar reaction to the vaccination as my wife had, I’m wondering if the reaction is caused by the body reacting to the injections of more spike proteins, the monkey virus or something else.