So far I've heard 2 interpretations of why the data coming out of Israel seems to show the Covid vaccines are starting to fail. 1. The Pfizer vaccine is losing its effectiveness. 2. Covid has mutated as viruses do and Delta is no longer stopped by the mRNA vaccine. If we continue to see Covid outbreaks even among those with a 3rd shot/booster then this seems more likely.
So did I ! For life, spring 2020