According to the MSRI website: Children’s Medical Safety Research Institute, August 30, 2016, the shingles vaccine, Zostamax, has two FDA-approved changes to its warning label: “The first was in August 2014, when, in addition to potentially causing chickenpox, another side effect was added: shingles! …
The vaccine that had been – and continues to be – aggressively marketed to prevent seniors from contracting this excruciating condition was found to actually cause shingles in some individuals.”

In February 2016 the FDA approved another label change to warn of another potential side effect: the eye disorder of necrotizing retinitis, which inflames and scars eye tissue and unless promptly treated can lead to permanent vision loss.

The article notes that the vaccine is of limited effectiveness: “UCLA researchers found that only one in 175 people who get the vaccine will be able to dodge a shingles flare-up.”
It’s enough to send a shingle up my spine!