Yes, it is.
At my manufacturing plant we've had many cases of people who were vaccinated getting sick, and some unvaccinated.
We've had a
very serious case with one man in his late 60's who was not vaccinated, and a moderately concerning case in an older lady in her early 70's that was.
He is still out of work recuperating ( not sure how long he's been off...perhaps 4-6 weeks ), and she is starting her 4th week off today.
We've had one death that occurred to a man in his mid-60's that had had CovID-19 and was also vaccinated, can't be sure which happened first.
He passed away about a month ago.
As a matter of public record, the recent breakout of "delta" in Barnstable County, Massachusetts early this summer,
consisted of some 74% of people who were already fully vaccinated.
"Delta" ( and the other variants ) doesn't care...people are coming down with it on both sides of the track, vaccine or no vaccine.
My advice?
Look to the Lord for your salvation in this life, and not a vaccine.