Overall incidence of zoster (defined as the presence of the specific diagnostic code in the medical record, accompanied by a prescription for acyclovir) was lower among vaccine recipients, with vaccine protective efficacy estimated to be 64% after a single dose and 76% after two doses.



Zerbo O et al. Effectiveness of recombinant zoster vaccine against herpes zoster in a real-world setting. Ann Intern Med 2024 Jan 9; [e-pub]. (https://doi.org/10.7326/M23-2023. opens in new tab)