San Francisco's Moscone Center, one of two mass COVID-19 vaccination sites in the city. (Photo via Rob Young/Flickr)

San Francisco’s COVID-19 Joint Information Center announced Sunday that the Moscone Center and City College of San Francisco high volume vaccination sites are pausing operations, but no existing appointments will be canceled. The sites will reopen once the vaccine supply is sufficient to resume operations.

Moscone is expected to be closed for a week, while the City College site expects to resume operations on Friday for second doses only. A third high volume site is launching this week, but with limited appointments available.

With the opening of two high volume COVID-19 vaccination sites — Moscone and City College — the city increased the number of vaccines administered by health care providers, pharmacies and the Department of Public Health to an average of 7,400 doses a day over the last seven days, officials said.

The city has the capacity to administer more than 10,000 vaccines per day but lacks the vaccine supply, officials said. “The vaccine supply coming to San Francisco’s health care providers and the Department of Public Health is limited, inconsistent and unpredictable, making vaccine roll out difficult and denying San Franciscans this potentially life-saving intervention,” officials said in a statement.

According to officials, at the beginning of last week, San Francisco vaccinated 31% of the 65 and older population, and ended the week at 47%, nearly at the halfway mark. San Francisco health care providers, pharmacies and DPH has to vaccinate more than 760,000 residents over the age of 16, requiring more than 1.5 million doses. As of Feb. 13, San Francisco received 262,000 doses and administered more than 190,000 doses to San Franciscans and surrounding Bay Area residents. The remaining vaccine doses have been set aside for scheduled first appointments and scheduled second doses.

“I’m frustrated because we’ve shown that SF can administer shots as soon as they come in,” San Francisco mayor London Breed wrote on Twitter Sunday afternoon. The City College of San Francisco site “has been running well for weeks. The reports from Moscone are overwhelmingly positive. The only thing holding us back is a lack of supply, and I’m hoping that will change soon.”