One of the most notable things about Covid is that the IFR seems to be closely proportional to baseline all-cause mortality for most groups. It's obviously not

One of the most notable things about Covid is that the IFR seems to be closely proportional to baseline all-cause mortality for most groups. It's obviously not exact, so it's hard to tell whether this is just a case of coincidence and squinting to find a pattern in the noise. But still, I think there's potentially something deep going on that may tell us more about what mediates Covid lethality.