BUCKS COUNTY, PA — With both new COVID-19 infections and vaccine supplies increasing in Bucks County, county officials say the opening of their fifth mass vaccination site this week couldn’t have come a better time.

A limited opening of the former Giant grocery store in the Warwick Square shopping center on York Road began Monday, operating on an appointment-only basis. It is the county’s largest site to date, officials said.

The Warwick Square location is one of five sites run through the county’s partnership with AMI Expeditionary Healthcare. Three clinics have operated since Feb. 16 at the Bucks County Community College campuses in Bristol, Newtown and Perkasie, and the fourth site, at the former H&M store in the Neshaminy Mall, opened March 13.

More than 52,000 doses of COVID-19 vaccine have been administered at those four sties through Saturday, including more than 10,000 last week, officials said. More than 264,000 people have received at least one dose of the vaccine countywide, more than one-third of the county’s population.

As promised, county officials received 20,000 doses of Johnson & Johnson vaccine from the state on Monday after the state abandoned plans to open its own regional vaccination sites in southeastern Pennsylvania.

Bucks County last week cleared its wait list of people eligible for phase 1A of the vaccine rollout who had pre-registered with the county. County officials have now begun contacting 1B- and 1C-eligible people who had pre-registered, asking them to schedule their vaccination appointments. Appointments can be made via the county’s vaccination information portal.

For full information about getting a coronavirus vaccine in Pennsylvania, visit Patch’s information hub.