[TheGrumpyBrit]

The problem is, we're not testing people until they're already in hospital. So that 4% mortality rate is very much skewed. The vast majority of people who show symptoms are just self isolating and getting better without ever being tested. We have no clue how many of those people actual had COVID-19 and how many had something else, although the spread we have observed would suggest that it's probably on the higher side.

Given the lack of availability of testing, and the fact the the available testing is (rightly) being reserved for those most in need, I don't believe we can rely on the current mortality figures as any measure of accuracy. They're probably more like 0.5% at best.