Pennsylvania’s Department of Health confirmed Tuesday the Bryce Jordan Center’s COVID-19 vaccine clinic, alongside other regional clinics across the state, will momentarily pause operations until at least April 20.

The announcement comes just hours after Governor Tom Wolf said Pennsylvania would issue a state-wide pause of the Johnson & Johnson vaccine — the only vaccine offered at the BJC. The Centers for Disease Control and Prevention recommended a halt after a few patients experienced “rare and severe” blood clotting.

“We really, at this stage, are going to be prudently pausing the regional vaccine clinics, specifically at the Bryce Jordan Center,” acting Health Secretary Alison Beam said Tuesday. “As soon as federal guidance was issued, we likewise followed suit and paused that clinic at this time until we await further guidance from the federal government.”

The BJC’s site, which opened on Friday, April 9, administers around 600 Johnson & Johnson vaccines to patients daily. Its original schedule would’ve had vaccine appointments available Thursday through Monday each week.

At this time, it’s unclear when the BJC’s site may resume operations or how many single-shot doses it’s already administered.

Although more than 6.8 million Americans have received Johnson & Johnson’s single-shot vaccine, just six cases were found — all in women aged between 18 and 48 years old. Beam said preliminary information suggested no affected patients were from Pennsylvania.