Vaccination does not 100% protect you from infection. What it does do is reduce the severity if you do contract it, so you don't go to the hospital and die.
If you are around others who are unvaccinated, it increases the potential for infection, even if you have been vaccinated.
DW is a MD. In her hospital all staff was vaccinated in early January. In late April about 5 in her department tested positive for Covid.
Absolutely true and worth repeating: the vaccine does NOT protect you 100% (more like 94%). But MORE IMPORTANTLY - they do not protect you at anywhere near those levels against many of the variants. And, there have been people (breakthrough cases or those who caught a variant) that were vaccinated and did die.
The "Delta" (India) variant is in the US and has already taken over the #1 position in the UK with 60+% of all new cases being of the Delta variety. Delta is more transmissable and more deadly than the original. Fauci has said the past few days he's very concerned about it spreading as rapidly here as it has in the UK. It's currently at about 6% of all cases - but those are just the ones they know about..and he and others suspect there are a heck of a lot more than 6% already with expectations it's gonna take off big-time.
Pfizer and Moderna only protect ~87-88% against Delta. There are other variants (I can't remember at the moment..maybe the Brazil one) that the current vaccines only protect ~50% against (if that).
Wife and I have been vacc'd since March but still wear our masks. We're still in essence "COVID hermits" and try our best to avoid going inside buildings. I've had to go to quite a few Dr's appts lately and have wanted to get out of there as fast as humanly possible.
Bottom line - the vaccines are not an "immunity idol", and the risk of infection even for vaccinated people IS NOT ZERO. How much above zero is a subject for debate - but at least for Delta, it's at least 12% above zero with only 88% protection. And with the Brazil (IIRC) one..it's only about 50/50 at best.
Everyone has to decide for themselves how much risk they are comfortable taking. For us, we're not going anywhere. I still stick solely to grocery pickup. We won't go to a restaurant - even for carry-out. And I sure won't get on any airplanes or even go to a large outdoor event. (Have one of those coming up - annual family picnic with ~100 people, a lot of which will be kids who are by and large unvaccinated. Not going).
To each their own, but we are FAR from this thing being "over" - especially as the variants continue to mutate and spread.