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I understood the immune system has several components.
Some "remember" for several months to a lifetime and can quickly make antibodies specific to a disease vector, so after vaccination those are ready to react.
Others actively patrol but those fade quicker. But they will react very fast to COVID and usually stop active infections.
Unfortunately, Omicron is good at breakthrough infections when the active patrolling antibodies have faded.
So the booster kicks off the patrolling ones again. And also the memory ones but those last probably at least 2 years for COVID.
For tetanus shots you get about 10 years memory.
Immune system = super complex but here's a fun video: https://youtu.be/lXfEK8G8CUI
Expecting somebody on here to correct me soon though as I'm not sure I got it 100%
Now omicron spreads fast and pushes out less fast spreading Corona viruses.
But I'm not sure that means an even faster spreading but more dangerous variety that slowly makes you sick / kills slowly can't happen... A fast spreading fast making you very ill / dead virus usually fades out.
We have to wait and see...
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JWestland
The longer this thing goes on, the more I realize how little I understand, and also how poor the general reprorting is. I don really understand why the booster works, I don´t understand whether IF this is a less harmful version that makes it harder for a worse variant to come along in the future.
In more positive news I got my booster on 23rd. We were in Lincolnshire, my partner had a booster appointment and they were quiet, asked me if I wanted it as a walk in and away we went. Not /entirely/ sure how I will get it added to my Dutch records but we will try.
Slightly annoyingly I accepted the walk in as on 23rd it was not yet being offered to my age group over here, but they got their skates on and actually I could have had it by now.
I did notice in the UK that nobody seemed to have LFTs in stock.
I also notice that the ¨thoroughness¨ of tesing at collinson etc places varies enormously. It would be nice to think that someone were looking at the data to see if testers or providers are having an expected level of positives.