Let's check in on breakthrough deaths in Massachusetts, where breakthrough deaths have soared by 290 just in the last week.
Massachusetts reported 106 breakthrough deaths by the end of July 2021, according to NBC Boston, here.
At the time there had been 18,082 total COVID deaths in Massachusetts. At the time breakthrough deaths represented a tiny fraction of all COVID deaths (just 0.6%).
Through January 29, 2022 there have been 21,909 total COVID deaths for an increase of 3,827 total COVID deaths during the intervening period in Massachusetts.
As of January 29, 2022 Massachusetts is reporting a cumulative total of 1,789 breakthrough deaths. Subtract the 106 through July 2021 and you get 1,683 breakthrough deaths from August 1, 2021 through January 29, 2022.
1,683 breakthrough deaths is 43.977% of the total COVID deaths of 3,827 which have occurred since last July. More than 8% of all COVID deaths have now been among the vaccinated in Massachusetts.
If this isn't a picture of evolving vaccine failure I don't know what is.