Confirmed cases of the highly contagious Delta variant of the coronavirus are on the rise in Los Angeles County, prompting renewed calls for residents to take advantage of the available vaccines.

While COVID-19 case, hospitalization and death rates remain low countywide, this particular variant — which could be two times as transmissible as the conventional strain — presents particular risk of prolonging the pandemic, which would primarily affect those who have yet to get their shots.

“This is a pandemic of unvaccinated people,” L.A. County Public Health Director Barbara Ferrer said during a briefing Thursday.

Of the 123 people confirmed to have been infected with the Delta variant in L.A. County, 110 were unvaccinated and three were partially vaccinated. There were two hospitalizations among people in this group.

By comparison, variant cases have been found in 10 fully vaccinated individuals, none of whom ended up needing that level of care.

“If you are fully vaccinated, you have a lot of protection,” Ferrer said. “And for the very small numbers of people that may end up in fact with a breakthrough vaccination case, they really did not have serious illness.”

That’s especially key as the Delta variant — which is also known as B.1.617.2 and was first identified in India — continues to spread. The latest report of 123 cumulative cases is up markedly from the total of 64 that the county disclosed last weekend.

That figure is not without caveat, however. When it comes to the sequencing that’s done to identify variants, different labs report those results on different timeframes.

“We’re a little bit at the mercy of the labs that are reporting this information to get the data,” Ferrer said. “So these jumps just happen because, you know, one lab that didn’t report for three weeks all of a sudden gives us the sequencing on their specimens. And that’s really what you’re seeing.”

That’s not to say the figure is meaningless, because Ferrer added: “We’ve had a lot of increase in the circulation of the Delta variant.”

Of the county’s Delta variant cases, 49 were found among residents of the Antelope Valley cities of Palmdale and Lancaster. Fourteen of them came from one household.

Overall, 372 people are known to have been infected with the Delta variant statewide, according to figures from the California Department of Public Health.

“The Delta variant is more contagious, it’s deadlier, and it’s spreading quickly around the world — leaving young, unvaccinated people more vulnerable than ever,” President Biden wrote on Twitter on Thursday. “Please, get vaccinated if you haven’t already. Let’s head off this strain before it’s too late.

Although 67% of L.A. County residents ages 16 and older have received at least one dose, and 58% are fully vaccinated, officials warn that less-inoculated communities will remain exposed to potential outbreaks.

“Where there are pockets of unvaccinated individuals, these variants can proliferate,” Ferrer said.

Continued COVID-19 spread also presents a risk to those who either can’t be vaccinated because of a medical condition or their age, as well as those who are immunocompromised and don’t get the same sort of protective response from the shots.

Some slight warning signs are starting to emerge.

After a long and welcome slide, Ferrer said L.A. County is starting to observe “very small increases in cases, hospitalizations and daily test positivity.”

A Times analysis found that L.A. County’s average daily number of new coronavirus cases fell to a low of 162 for the seven-day period that ended June 3, the lowest such number in more than 14 months.

Since then, there’s been a slight uptick. For the seven-day period that ended Wednesday, L.A. County was averaging about 190 cases a day.

Countywide COVID-19 hospitalizations fell to a new low, 212, on June 12. That number has since risen to 234.

Ferrer said the county is watching the trends.

“Small increases can just really be a little bit of noise, and this can all settle down, or they can be, in fact, a real sign that there’s been some slight increase in community transmission,” she said.

But Ferrer suggested workplaces do more than the minimum required by the state to keep transmission low. For instance, if factory owners are aware that they have a significant number of unvaccinated workers, it would be a good idea for them to keep partitions in place to help reduce spread of disease.

She also suggested that employers be proactive in giving respirators — such as N95, KN95 and KF94 masks that filter out very tiny particles in the air — to unvaccinated workers.

Ferrer said she’s not concerned the recent uptick in cases is a precursor to a surge. But she does worry the latest data could signal that disproportionately low vaccination rates among some communities, such as Black residents, are beginning to result in slight but perceptible increases in disease transmission.

In L.A. County, 44% of Black adults and 53% of Latino adults have received at least one dose of vaccine, compared to 65% of white adults, 61% of Native American adults and 74% of Asian American adults.

“I want to make sure that we address any disproportionality early on by identifying those places where we’re seeing pockets of increase,” Ferrer said.





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