An analysis of breakthrough COVID-19 infections in Pennsylvania shows the phenomenon happens infrequently, accounting for just 6% of the state’s nearly 640,000 cases recorded since January, health officials said Tuesday.

The Department of Health said the data shows the infection rate among unvaccinated and partially vaccinated residents is 7.1 times higher compared to those who have been fully inoculated. Vaccinated patients also account for 3% of the state’s recorded deaths, acting Secretary of Health Alison Beam said during a news conference at Penn Medicine Lancaster General Hospital.

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