Does anyone think the following idea has any merit or am I just talking out my ********. We are told that none of us have any immunity to this novel virus, I wonder if that is exactly true. I wonder if we all or at least most of us have a bit of immunity to a very low exposure to it, and this is on a sort of sliding scale. As the exposure levels increase (either via time of exposure or virus concentration in parts per million) then an increasing number of us would catch the virus.
So lets make some numbers up, lets say 500 people in a train station inhale 1 virus particle. I suspect most of these people will not go on and get the virus, lets say just 10 do, but I also suspect that most of the other 490 people will not have loads of anti bodies to the virus that could be detected in any test.
If as time goes on the 490 people get exposed to gradually more and more virus particles, then the number infected will increase, but unless the virus load is massively increased then the number of infections should also be sort of gradual.
So perhaps out of the remaining 490 people we could end up with say 450 that can cope with 20 virus particles per million (as mentioned I am just making these numbers up to make the point). Again hardly any of this 450 will exhibit anti bodies to any of our tests. But what it does mean is that the 50 people who were the weakest (in terms of catching the virus) have now caught it and are hopefully making a recovery.
This might help to explain what has happened in London. I think if someone is exposed to a super spreader, or has a long time exposure to the virus such as health workers then they will catch the virus. But if there is just a lit bit of virus around (a bit like back ground radiation), then the Londoners who could not cope with this have already caught the virus leaving behind the ones that do have a bit of natural tolerance to a small viral load.
So although these Londoners who have not caught the virus will not have anti bodies to the virus, they are on average (due to the process of natural selection) less likely to catch the virus that say people from Bristol, which unless it has changed recently, have not had many cases in that City, and so natural selection will not have taken place.
What do you all think, is the above a load of rubbish or could something like this be happening?