But excess mortality is the total. It's not the slice of the pie where if you grow one, the other shrinks, it
IS the pie no? There was an huge bump in excess mortality year-over-year. If it was moved around you'd expect the total of all the dips to come close to the bump? That's not what has been observed.
So something caused more people to die than usual. What is it? (rhetorical question not asking directly).