COVID vaccinations

[I would mention the study, main author and journal as a little foreplay here.]
“Emergence of new variants of concern, vaccine hesitancy, and barriers to global vaccine equity have created challenges to containing the pandemic.”
Before COVID and when everyone was an infectious disease and vaccine expert, I thought of vaccination as fully protective against a particular disease.
The vaccination rates for COVID-19 are plateauing; there is no concern, at least in the US, over supply, no lack of public service announcements, no financial barriers.