I just read a German article comparing influenza with COVID-19. There is a table with Mortality displacement (rates? cases?) and laboratory-confirmed cases of influenza.
I'm super confused by this table. I think I know what laborartory-confirmed death cases are:
- A person dies and the symptoms indicated influenza
- A sample (e.g. spit) is taken
- The virus can be proven to be there
- Other reasons for the death can be ruled out
I thought that Mortality displacement would be an estimation of the unknown cases: For many dead people there is not laboratory test.
But the two things that don't quite fit:
- The Mortality displacement is sometimes 0.
- The Mortality displacement is sometimes lower than the laboratory-confirmed cases, e.g. 2009/10.
- The Mortality displacement is sometimes vastly higher than the laboratory confirmed cases: 2008/09 the Mortality displacement was 18,800 and the laboratory-confirmed cases were 10.
Can somebody explain mortality displacement in a simple way?