Mortality rate under age 45 close to 0%. www.washingtonexaminer.com/news/stanford-doctor-coronavirus-infection-fatality-rate-for-people-under-45-almost-0?utm_source=share&utm_medium=ios_app
At the end of May Swiss immunologists led by Professor Onur Boyman published what is probably the most important study on Covid19 lethality to date. This preprint study comes to the conclusion that the usual antibody tests that measure antibodies in the blood (IgG and IgM) can recognize at most one fifth of all Covid19 infections.
The reason for this discrepancy is that in most people the new coronavirus is already neutralized by antibodies on the mucous membrane (IgA) or by cellular immunity (T-cells). In most of these cases, no symptoms or only mild symptoms develop.
This means that the new coronavirus is probably much more common than previously thought and the lethality per infection is up to five times lower than previously assumed. The real lethality could thus be well below 0.1% and hence in the range of strong seasonal influenza.