COVID-19 testing at UC San Diego
A staff member at the Center for Advanced Laboratory Medicine at UC San Diego Health prepares samples for testing of COVID-19. Courtesy UC San Diego

The San Diego County Health and Human Services Agency reported 508 new cases of coronavirus on Thursday and 17 more deaths from the disease.

Out of 17,763 test results received in the past day, 3% were positive, and the 14-day rolling average of positive results again ticked down, to 3.6%.

County officials also reported six community outbreaks for a total of 29 in the past week, linked to 127 cases.

Meanwhile, the county has received 1,067,675 doses of vaccines, with 114,427 ready to be administered.

Shortages, though, have frustrated efforts – the latest involves the Pfizer vaccine.

“It is consistently erratic and consistently unpredictable,” county Supervisor Nathan Fletcher said of vaccine deliveries.

Since the first local case of coronavirus nearly a year ago, the county has reported 261,861 cases and 3,359 deaths.

Daily cases though have fallen off substantially since late January, a trend that has left county officials hopeful that they could be nearing an exit from the state’s purple tier, which calls for widespread business closures.

City News Service contributed to this report