The number of COVID-19 patients hospitalized in San Diego County increased from 296 to 311 in the latest state figures.
Of those patients, 86 were in intensive care on Sunday, a increase of two from Saturday.
San Diego County reported 1,071 new COVID-19 cases on Friday, a relatively high daily number that public health officials believe is the result of Thanksgiving gatherings.
The influx is up from reports in the 600s the previous two days, increasing the county's cumulative total cases to 389,660. On Sept. 10, 1,188 cases were identified.
The county reported one additional death on Monday, increasing the total to 4,352 fatalities since the pandemic began.
The county does not report case or death numbers on weekends.
Local health officials believe the upturn in cases was tied to Thanksgiving gatherings and not due to the new Omicron variant, which has not yet been identified in San Diego County.
"Unfortunately, rises like these after holidays are not unexpected," said Dr. Cameron Kaiser, county deputy public health officer. "We are vigilant for any changes in cases that Omicron might cause, but we've seen similar spikes like this in the past."
Kaiser said similar spikes are likely to occur during the next couple of months because of other upcoming holidays.
"County residents need to be mindful that Delta is still out there," Kaiser said. "Indoor masking, vaccination and good hygiene are still strongly advised. People should not visit family and friends or go to work if you're ill."
The Omicron variant has been identified in Los Angeles and San Francisco. County health officials urge San Diegans to continue following the measures to protect against all varieties of COVID-19, including masking and avoiding large gatherings.
A total of 12,750 new tests were reported to the county on Monday, with 4.1% returning positive over the past seven days. The county does not report test numbers on weekends or holidays.
The number of county residents who have received at least one shot of a COVID-19 vaccine is now more than 2.66 million — or 84.7% of residents age 5 and older.
More than 2.36 million people, or 75.1% of residents 5 and older, are fully vaccinated. Roughly 460,110 San Diego County residents 18 years of age or older have received a booster dose.
