HARRISBURG, Pa. — The proportion of coronavirus infections and hospitalizations among vaccinated Pennsylvania residents has risen sharply in the past month, although the shot remains broadly protective.

That’s according to new statewide health data. The latest Department of Health statistics on so-called “breakthrough” infections show from Sept. 5 to Oct. 4, vaccinated people represented just over a quarter (26%) of more than 135,000 new infections and nearly 5,000 hospital admissions across the state.

That’s up from just 6% of cases and 5% of hospitalizations between January and September. Pennsylvania residents who remain unvaccinated are still far more likely to contract the coronavirus, become hospitalized and die than those who got the shot.

Dr. Denise Johnson, the state’s acting physician general, says the data reinforced the case for booster shots. Last month, U.S. health officials approved a third dose of the Pfizer vaccine for all Americans 65 and older, along with younger people with health issues or those in high-risk, frontline jobs.