Sincere #apologies for freaking out with this tweet, if anyone cares. After further analysis of the data, it turns out the incidence "revealed" is not significative, and the curves simply reflect the general historical incidence of the virus at the time people got vaccinated.
Furthermore, if the incidence "revealed" by these furtive graphs could at most be used to cover short-term side effects by masquerading them into COVID, the numbers lose most (if they had any) significance when related to the huge number of administered doses.