In South Africa, we are far from having mandatory flu vaccinations imposed on any category of health care workers. However, I am an advocate for the wisdom of getting my annual shot, but I have heard numerous arguments against it. Primary among these is, of course, "I once had one of those and I got flu worse than ever before". Probably because they were incubating the virus at the time. Another one which left me somewhat gobsmacked was "I heard about a married couple who went every year for their vaccination, and now they both have Alzheimer's". This from a colleague RN.
In answer to the questions: 1: I always try to get my annual shot, but sometimes I forget, and once I had a raging bout of flu just as it was released and was warned against getting the shot by a doctor. 2: As explained, no, not in South Africa, and is unlikely to become so, at least not in the foreseeable future. 3: No concerns. On the contrary, it's nice to walk symptom-free among all the sufferers! 4: No, and I'm not likely to.