Chippy_boy
Well-Known Member
The Infection fatality rate is somewhere between 0.25% and 1% based on studies in Germany and America
From the measured mortality you can then get a rough idea of how many people have had it - very rough based on a that spread.
For example if we assume 0.5% IFR and 50,000 deaths in the UK then 10m have had it in the UK. However nothing is simple. Can we say that the IFR is uniform when we know for example that demographics have such a huge effect. Look at Africa. Look at Singapore. The migrant population hut hard, the domestic population untouched. Look at New York, New York City has antibody rates of 50% according to a very large survey and yet the suburbs have hardly been touched. It's not uniform.
I must admit the antibody testing in the UK conflicts with this.
I think your logic may be flawed. The fatality rate as quoted in the US and Germany is calculated by taking the number of people who have died and dividing that by the numbers of people they believe to have been infected. The latter is an input to the equation, not an output, so you cannot use the fatality rate like you have done above, to calculate the numbers infected.