Reviewing data from more than two million U.S. recipients of COVID-19 vaccine, the study authors concluded that the incidence rate ratio of shingles following COVID-19 vaccination was 0.91.
Shingles is caused by the virus that also causes chickenpox.
An incidence rate ratio of less than one indicates that the incidence of shingles in vaccinated individuals is potentially lower than in unvaccinated individuals. The study authors, however, asserted that COVID-19 was “not associated with an increased risk of herpes zoster.”
With a confidence interval of 95%, the study authors estimate that margin of error ranges from 0.…