Actually at least in Germany the numbers for influenza are entirely based on statistics. In particular the 25000 people died of influenza in 2017 number that is

Actually at least in Germany the numbers for influenza are entirely based on statistics. In particular the 25000 people died of influenza in 2017 number that is thrown around is based on looking at the usual statistics over the same period and everything above that is attributed to influenza. I think we will only have only have accurate statistics about the death rates etc in maybe a year