The order again requires masks at all indoor public transportation hubs, including airports and bus terminals.
Public Health Director Barbara Ferrer said Thursday the order is based on the U.S. Centers for Disease Control and Prevention's opinion that mask-wearing on transit remains an essential step in preventing spread of COVID-19.
"They are experts," Ferrer told reporters during an online briefing. "They made a determination that at this point having that requirement in place is necessary for the public's health, and that resonates with us."
At the urging of the CDC, the U.S. Department of Justice on Wednesday appealed a ruling made earlier this week by a federal judge in Florida that struck down the U.S. government's rule requiring masks to be worn on public transportation, most notably aboard airplanes.
U.S. District Judge Kathryn Kimball Mizelle ruled that the CDC had exceeded its authority in issuing the mask-wearing mandate on transportation systems. But on Wednesday, the CDC issued a statement saying it continues to believe that requiring masks in indoor transportation settings "remains necessary for the public health."
"CDC will continue to monitor public health conditions to determine whether such an order remains necessary," according to a statement from the agency. "CDC believes this is a lawful order, well within CDC's legal authority to protect public health."
In response to Mizelle's ruling on Monday, public transportation agencies across Los Angeles County announced that masks would become optional, including aboard Metrolink commuter trains and on Los Angeles County Metropolitan Transportation Authority buses and rail lines. Los Angeles International Airport and Hollywood Burbank Airport also announced that masks were optional.
Ferrer said the county's renewed order -- which took effect at 12:01 a.m. Friday -- reinstated mask orders in all of those settings. The rule will not apply to people aboard airplanes, which are beyond the county's jurisdiction.
Ferrer said she anticipates the cities of Pasadena and Long Beach, which have their own independent health departments, will align with the county and also reinstate the mask requirement on public transit and at transportation hubs. That would mean Long Beach Airport would also be impacted.
It was unclear how the requirement at airports will be enforced. The Transportation Security Administration announced this week that it will no longer enforce mask-wearing rules at airports in response to the federal judge's ruling.
Officials from both Metro and Metrolink issued statements saying they would adhere to the county's order and again require masks aboard trains and buses starting Friday.
Ferrer said she feels "really, really sorry" that the new county order will likely create confusion among residents feeling a sense of "whiplash" due to rapidly changing rules. But she noted that the CDC never changed its recommendations regarding mask-wearing on public transit, and said the Florida court ruling was made by "a federal judge with little experience in public health" who questioned the CDC's authority.
Ferrer said public transportation settings can often be crowded, putting people in cramped environments with sometimes-little ventilation, conditions that can spur spread of the virus.
She stressed that the county is still seeing "a lot of transmission" of COVID-19, and the infectious BA.2 subvariant of the virus is continuing to spread -- now representing 84% of all local cases that undergo special testing to identify variants. A pair of offshoot "sublineages" of BA.2 have now also been identified, one of which has already been linked to "significant spread" of cases in parts of New York.
While BA.2 is blamed for rising case numbers, those cases still have not led to a spike in hospitalizations due to the virus. In fact, hospitalizations have continued to trend downward. But Ferrer said that doesn't diminish the risk of new and potentially more dangerous variants of the virus developing the more it circulates.
The virus "is still equated with significant illness for some people," she said. "It still can cause, even for people who experience mild illness when the first get infected, it can still cause for a good percentage of people 'long COVID.'"
Throughout the pandemic, Los Angeles County has often imposed stricter COVID mandates than those required by the state and federal government. It was one of the first jurisdictions to impose widespread indoor masking mandates, and it maintained mask requirements for large-scale outdoor events even as similar restrictions were eased elsewhere.
The county on Thursday reported another 2,123 infections, raising the pandemic total to 2,857,772. Ferrer said the county's seven-day average daily number of new cases is now 1,261, up from 1,017 the previous week. The average daily rate of people testing positive for the virus was 1.8%.
Another 13 COVID-related deaths were reported Thursday, raising the overall death toll to 31,913.
According to state figures, there were 224 COVID-positive patients in county hospitals as of Thursday, down from 230 on Wednesday. Of those patients, 22 were being treated in intensive care, down from 28 a day earlier.
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