Every state has both death and vax status databases. A simple merge of the two tables (using name, SSID, DOB, sex, etc) tells us, for each person who died, how many days elapsed from each vaccine dose. When you plot this for the Medicare data, it’s “supposed” to be dose independent because the vaccine is “supposed” to have no impact on mortality. It should be just the background death rate perhaps with the COVID deaths flattened if it works as advertised.
The reality is that the curves are not horizontally shifted versions of each other. That means the intervention had an unintended all-cause mortality effect when COVID wasn’t present (i.e., to kill people).