COVID-19 live updates: CA test positivity rate jumps to 4.2%

SAN FRANCISCO (KGO) -- A surge in coronavirus cases has been reported in the Bay Area and across California as well as the country due in part to the emergence of the highly-contagious omicron variant.

The latest number of confirmed cases in the U.S. can be found at the CDC's 2019 Novel Coronavirus in the U.S. page. (The CDC updates the webpage on Monday, Wednesday and Friday.)

Join anchor Kristen Sze for ABC7's daily, interactive newscast about the coronavirus outbreak in the Bay Area and around the world. You can check here to stream the show Monday-Friday at 3 p.m.

• MAPS: Check out the latest maps of COVID-19 cases, deaths in the US, world


• CORONAVIRUS IN CA: Get resources and information about COVID-19


• LATEST LOCAL CASES: Updated number of COVID-19 cases, deaths in San Francisco Bay Area


• CORONAVIRUS TIMELINE: Tracking major moments of COVID-19 pandemic in San Francisco Bay Area

Here are the latest developments on the respiratory illness in the Bay Area:

11:45 a.m.
Appointments now required at Contra Costa Health Services COVID-19 testing sites.
Due to an increase in demand, appointments are now required at Contra Costa Health Services' community COVID-19 testing locations in Richmond and San Ramon, health officials announced Thursday. For more information on testing, visit this page.

11 a.m.
CA's new COVID-19 data shows sharp spike in cases
Thursday's California coronavirus data shows the test positivity rate jumped to 4.2%, hospitalizations are back over 4,000 and there were 15,485 new cases reported. A breakdown of the numbers is below:

15,485 new cases
4,969,615 total cases

102 new deaths
75,383 total deaths

7 day test positivity rate = 4.2%

4,005 hospitalized patients
995 ICU patients

5 a.m.
Ten million treatment courses of Pfizer's newly FDA-authorized COVID-19 pill have been purchased by the federal government, the White House announced. The White House said 265,000 doses will be available in January and all 10 million will be delivered by late summer. The White House said it also bought 3 million courses of Merck's treatment, though that pill is not yet authorized.

5:45 p.m.
Final performances of 'A Christmas Carol' at Golden Gate Theater canceled
The remaining performances of "A Christmas Carol" at Golden Gate Theater have been canceled due to breakthrough cases within the cast. Ticket holders will be contacted by their original point of purchase. For questions, please email feedback@broadwaysf.com.

11:30 a.m.
Gov. Newsom lays out new actions to slow spread of COVID
Governor Newsom is laying out new actions to slow the spread of COVID in California that includes a booster mandate for health care workers, increased testing access for students, and expanded hours at testing sites.

9:45 a.m.
Pfizer pill becomes 1st US-authorized home COVID treatment
U.S. health regulators on Wednesday authorized the first pill against COVID-19, a Pfizer drug that Americans will be able to take at home to head off the worst effects of the virus.

7 a.m.
Booster shots 'will really help us' with omicron, CDC director says
About 73% of U.S. COVID-19 cases are now the omicron variant, but that number rises to 90% in areas like New York, CDC director Dr. Rochelle Walensky told "Good Morning America" Wednesday.

"Things are moving quickly," she said. "The doubling times of this virus are very fast, around two days."

But Walensky said the booster shot "will really help" with this variant.

"What we know about omicron is that it has a lot of mutations, and with more mutations we need more immune protection. And that's really why this booster shot will really help us," Walensky said.

4:45 p.m.
Rep. Barbara Lee tests positive for COVID
Rep. Barbara Lee (CA-13) announced Tuesday that she has a breakthrough case of COVID. Rep. Lee says she is experiencing "mild cold-like symptoms" and following health guidelines which includes quarantining.

4:45 p.m.
Oakland requiring proof of vaccination for restaurants, bars, gyms and more
People visiting several types of facilities in Oakland as well as City Hall must now provide proof of vaccination to get inside. The City Council voted unanimously Tuesday afternoon to approve the requirement in an effort to boost the vaccination rate in the city. Places that will now require proof of vaccination include where food or drinks are served, entertainment venues, theaters, concert venues, museums, recreational facilities, yoga studios, gyms, fitness centers, senior adult care centers, large indoor events at facilities owned by the city or privately, City Hall and programs at city senior centers.

4:15 p.m.
California to require healthcare workers to take COVID-19 booster
The office of California Governor Gavin Newsom announced all state healthcare workers will be required to get a COVID-19 booster. The memo posted to Twitter did not say when, but that more details will be coming Wednesday.

3 p.m.
UC Santa Cruz to hold classes online for 2 weeks of winter quarter
University of California, Santa Cruz announced Tuesday that classes will be held online for the first two weeks of the winter quarter in January out of concern about the recent rise in COVID-19 infections and the likelihood that they will continue to increase because of holiday gatherings.

The school's winter quarter starts Jan. 3, but instruction will take place remotely instead of in-person until Jan. 18, although students are encouraged to return to campus on schedule and other campus operations will continue, UC Santa Cruz officials said.

2 p.m.
Santa Cruz Co. reports 2 cases of omicron variant
Santa Cruz County officials announced Tuesday that they have identified two cases of the omicron variant of COVID-19 in the county. Samples collected last Thursday and Friday from two people in their 20s living in the north part of the county tested positive for the omicron variant of COVID-19 that experts say is more transmissible than previous variants.

9:10 a.m.
SJ mayor proposes booster shot mandate for city employees
San Jose Mayor Sam Liccardo announced a proposal to require all San Jose city employees to have a booster shot or third round of vaccinations. The proposal would be a condition of employment for city workers, and would also apply to residents or visitors that enter city-owned facilities. If the proposal passes the city council vote, San Jose could become the first city in California with such a mandate. Currently, San Jose requires proof of full vaccination to all city-owned facilities.

7:15 a.m.
Fauci predicts omicron will peak soon
Dr. Anthony Fauci said omicron's peak will be soon: "It's going to be a matter of a couple of weeks that we then start to see just as dramatic a decline," he said. "That's what we're hoping for."

"When you have something that goes up this quickly, often you see it come right back down. Because what will happen is that either almost everyone is either going to get infected, particularly the unvaccinated, or be vaccinated," he said. "And the vaccinated people will either be -- particularly the boosted people, and it's very important to underscore right now the importance of getting boosted -- that those people will either be protected from infection, or if they do get infected, they'll have a relatively mild course of infection."

5 a.m.
Oakland may require vaccine proof for indoor businesses
People in Oakland would need to show proof of COVID vaccination at restaurants, bars, gyms, and other indoor public places under a proposed new ordinance. The city council is expected to vote on the measure Tuesday.

If passed, it would go into effect Feb. 1. The ordinance would apply to anyone 12 and older.

San Francisco, Contra Costa County, and the city of Berkeley recently approved similar measures.

4 a.m.
Moderna says COVID-19 vaccine booster increases omicron neutralizing antibodies
Moderna on Monday said its current vaccine booster increased neutralizing antibodies against omicron within a month of getting the shot. Here's the full story.

12 a.m.
Sens. Elizabeth Warren, Cory Booker test positive for COVID breakthrough
U.S. Sen. Elizabeth Warren and Sen. Cory Booker said Sunday they both tested positive for COVID-19 as the country deals with another surge in cases and the emergence of the omicron variant. Here's the full story.

Nearly three weeks after the first omicron case in the U.S was detected in San Francisco, researchers at the Chan Zuckerberg BioHub detected three new cases in the Mission District. Here's the full story.

Marin County health officials confirmed their first case of the omicron variant. The individual had recently traveled from the Eastern U.S. and was fully vaccinated but had not yet received a booster shot. The person is now in isolation with mild symptoms.

9 a.m.
COVID-19 positivity rate in New York City nearly doubles in 3 days
Alarmed by a rapid rise in COVID-19 cases and the increasing prevalence of the omicron variant, New York City officials were working to distribute one million masks and 500,000 home tests, Mayor Bill de Blasio said. Here's more on the increase in cases.

Santa Clara Co. health leaders fear surge of new COVID variant cases

Nearly a week after the first case of omicron was detected in the South Bay, Santa Clara County's top health officials are starting to express concern. Ten confirmed cases include four unvaccinated individuals, five vaccinated and one person who recently got a booster. Here's more from Santa Clara Co. Health Director Dr. Sara Cody.

1 p.m.
CDC committee recommends opting for Pfizer or Moderna over J&J, if given the choice

Most Americans should be given the Pfizer or Moderna vaccines instead of the Johnson & Johnson shot that can cause rare but serious blood clots, U.S. health advisers recommended Thursday. Here's the full story.