How deadly is COVID19? – Infection vs case fatalities

I have spent large chunks of my life trying to untangle medial data and research. COVID19 has long since defeated me. I have been unable to make any sense of the information we are bombarded with daily. So, I decided to go back to basics. At the start of the COVID19 saga, I was interested to know what the infection fatality rate (IFR) was likely to be. I felt I could then have a go at comparing it to other diseases, primarily influenza. The infection fatality is the number of people infected with the virus who then die. This is very different to the case fatality rate (CFR), which is the number of people infected with the disease who become unwell enough (sometimes, but not always) to be admitted to hospital – the ‘cases’. Who then die. Before COVID19 appeared, there used to be a reasonably clear distinction between the infection fatality rate (IFR), and the case fatality fate (CFR) and it is important that they should not get mixed up. Because the case fatality rate is almost…