Here are some problems with vaccines - people who have reactions to foreign organic matter can have organism going into a full shock and that can lead to a death. Apparently that is what is happening with Astrazeneca and Johnsons vaccines, as they are causing disturbances in immunity system(with less intensity than what covid is causing) and it can't calm down soon enough and causes the same reactions, that people are getting from covid infection, when immunity is mobilizing at max - essentially it is not covid, that is killing people, but reaction of immunity system. The most sensible action for this was to make immunity system to "forget" about covid(because it is freaking out immunity) and get attention of immunity to something else, that it knows - alcohol poisoning might be one of these.

Since I had reactions to penicilin, it seems that these vaccines are terrible idea to me in worst case scenarios(and this is where I have a line and where my sense of self-protection kicks in). I had calmed down my immunity reaction with alcohol - not claiming that it was the reason, but lookining in retrospect, I needed to calm down my nerves about something that nobody else at that moment was not sure how to deal with and the major consensus about covid at that times was that WE ALL ARE GOING TO DIE!!!, while in reality covid is not dangerous to 90% of humans, even more if their immunity system is not weakened and they are not old and stressed. Then there are other factors:

1. apparently people who had previous coronavirus infections, had stronger immunity reaction against covid as well(this basically answers the question of main topic).

2. blood type O and then blood type AB seems to had better results with covid - most probably because they either lack antigens or antibodies and does not fight against covid as much as immunity systems in other blood types. We now know, that covid was targeting blood system - up to the bone marrow and lung infection were just side effect of that targetting and fight with immunity(who was apparently fighting to the death of what it had to protect).

3. some genes gives better chances on surviving the covid(genetical test for me was putting me among this group)
https://www.nature.com/articles/s41586-020-03065-y

The whole strategy towards covid has gone south from the very start. For various reasons, and science is not among them - there seems to have been NEED to govern something at the scale of pandemic and this is what we have got. IMO there are more people who have died, because of actions to contain covid, than people who have been saved - and they have been saved mostly because of doctors who have not been following instructions(and were getting mocked and punished because they did not agree that sun was green, sky is yellow and deer is a horse), but acted on their own knowledge. So, I'm looking on WHO, CDC and others(who blamed unvaccinated, young people blaming old people in my country!) with utter horror what bureaucracy can do and how easily it can find others to blame and there is absolutelly no responsibility, because SYSTEM is responsible and bureaucrats are only cogs in this - just the same, as Nazis were doing their systematic work, where they could not punish themselves, because they could not see what horrific things they were doing.

IMO, vaccines are not giving long-term defense against covid and can't, because they were only meant as short-term defense, because there were no other medicines to fight covid. Young children and young adults who had contracted covid and went through it, in future might have the same effect as those people who had gone through SARS or other covid infections and now have better defense against covid.

Initially - 1 year before it was developed, I wanted to have a vaccine. Now I see no reason to have it and absolutelly have no wish to have it and now my attitude has changed to that it is potentially causing more harm and that most of the claims about any healthy effects of vaccines are baseless.
I am living in UK, in region, where has been done 100% vaccination for people aged 60+ and they are dying at the same rate(mostly vaccinated) as people are dying in my origin country, where vaccination rate is 50%(apparently most of the deaths are among unvaccinated). So, my take is that vaccination does not prevent deaths, but other reasons - overall health and immunity is one of them, and prevention of covid spread is another.
Whatever it is, the only way to slow down spreading covid, was shutting down borders - just like Japan and Taiwan was doing and just like China was doing when it was assuring, that covid was not dangerous. So, the borders in US had to be shut down between states, in Europe - between countries and for EU and US this is political issue, that is incompatible with mind of EU and US liberal bureaucrats, as that is like identity crisis - they would rather try something else, before agree that only one sensible action was to:

1. shut down borders

2. stop migration - in and out

3. allow border openings only between those regions, that have a zero covid cases

4. this is mindboggling, but the end result is that people, who were poor and with poorer health were confined to their houses, that degraded their overall health and covid was rampant among those, while people with good income(and health) and bureaucrats were still travelling around the world and spreading various covid strains with them. Probably after 100-200 years in future(because modern people can't judge their own, because they are part of the same society) people will look in disbelief at how people allowed this, where overall global political crisis(Essentially crisis of existence of US, that initially was fighting evil of USSR and eventually without that fight have lost it, subsequent rise of China, globalization which should lead to government of Earth - ironmically USSR, unlike Nazis wanted to take over and rule over whole Earth - it got only 15 republics, but last republic in global USSR would be Argentina...) played such a great impact on spreading pandemic. So, in the end immunity, vacciantion and pandemic can go down south, if people are moronic and have to sort out their political issues first and in this environment pandemic is a political weapon, just as well as any others.