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SAN DIEGO — The vaccination super site at the Del Mar Fairgrounds will be closed Friday through Sunday because of vaccine supply shortages.

Scripps Health said Tuesday that almost 2,000 appointments had to be rescheduled after a programming error on the MyTurn online appointment system.

“Yesterday was a hoot,” said Dr. Ghazala Sharieff, Scripps Health’s chief medical officer for acute care. “We had 2,600 patients come through and we had scheduled staffing for only 1,500.”

The chaos was due to a “human error” in the state’s vaccine scheduling system, which led to the scheduling of an additional 1,800 appointments for Monday and Tuesday in Del Mar.

“I reached out to the county Sunday night when all this was going on, they put me in touch with the state and I said, ‘Look, we don’t want to cancel patients even later in the week, can we get 1,800 doses of the Pfizer so that we can just keep going?'” Sharieff said. “And the answer was, ‘We don’t have any vaccines for you.'”

The Del Mar site was closed on Saturday and three other vaccination sites were closed Sunday because of issues with supply.

The super vaccination site is scheduled to reopen on Monday with appointments for this weekend, which were all for second doses, expected to be automatically rescheduled for Monday through MyTurn.

The county’s first Johnson & Johnson vaccines arrived on Monday and are now being administered at some vaccination sites. County Supervisor Nathan Fletcher said he hopes the third vaccine option, which only requires one dose, will help with supply issues as the county works to get everyone vaccinated.

“We still have some healthcare workers that would like to get vaccinated,” Sharieff said. “Some are waiting for Johnson & Johnson, so that’s our plan this week. Only 1,300 doses, offer it to our employees first. If those spots don’t fill up, we’ll open it up to patients, but I’m hoping if we get more then we could offer that at the Del Mar site as well.”

But as more residents become eligible for the vaccine, she remains concerned about vaccine supply, which could force more closures.