Yep, all my kids had chicken pox vaccines. I had chickenpox when I was 6 as there was no vaccine. Once chickenpox was defeated, it hid in one of my nerves on my rib , laying dormant until stress and lack of sleep triggered it to wake up and attack my nervous system along that very rib. I was prescribed antiviral which prevents virus from multiplying but not dying. Virus then goes back into hiding in that very rib again, waiting to be triggered and attack again.
Shingles shot prevents virus from multiplying at rapid pace when it triggered again. Still can get shingles but very very mild.