"Zerbo et al performed a retrospective cohort study that used data from 4 health plans in the Vaccine Safety Datalink from January 1, 2018, to December 31, 2022, and included adults aged 50 years or older. Only 28.8% were fully vaccinated for shingles. Keep in mind this non-randomized study design overestimates vaccine efficacy due to a variety of biases. The overall rate of shingles was low at 2.3% over 4 years or .58% per year."

https://www.thefocalpoints.com/p/waning-effect-of-shingles-vaccine
"Zerbo et al performed a retrospective cohort study that used data from 4 health plans in the Vaccine Safety Datalink from January 1, 2018, to December 31, 2022, and included adults aged 50 years or older. Only 28.8% were fully vaccinated for shingles. Keep in mind this non-randomized study design overestimates vaccine efficacy due to a variety of biases. The overall rate of shingles was low at 2.3% over 4 years or .58% per year." https://www.thefocalpoints.com/p/waning-effect-of-shingles-vaccine
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Waning Effect of Shingles Vaccine
Low Risks of Occurrence, Fading Partial Protection Should be Factored Into Vaccination Decision
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