LOS ANGELES (CNS) – The number of COVID-19-positive patients in Los Angeles County hospitals neared the 1,300 mark, continuing a nearly three-month upward trend, according to the latest data.

In late April, there were roughly 220 COVID-positive patients in county hospitals. As of Tuesday, there were 1,299, with 137 of them being treated in intensive care units, according to state figures. The 1,299 patients are the highest number since the tail end of a winter surge in late February.

Steadily rising hospital numbers over the past few weeks led to the county being moved into the US Centers for Disease Control and Prevention’s “high” virus-activity level on Thursday. The move came when the average daily rate of COVID hospitalizations rose to 10.5 per 100,000 residents, surpassing the threshold of 10 per 100,000.

If the county remains in the “high” category for two weeks — which appears inevitable — it will reinstate a universal mandatory indoor mask-wearing mandate. That is expected to occur on July 29.

If the mask mandate takes effect, it will remain in place until the county falls back to the “medium” virus-activity category for two weeks.

Masks are already still mandated in some indoor spaces — health care facilities, transit hubs, on transit vehicles, airports, correctional facilities and shelters. A universal mandate would spread the requirement to all indoor public spaces, including shared office spaces, manufacturing

facilities, retail stores, indoor events, indoor restaurants, bars and schools.

On Tuesday, the county reported 4,327 new COVID infections, raising the county’s cumulative total from throughout the pandemic to 3,230,019.

The actual number of infections in the county, however, is likely to be much higher thanks to the prevalence of residents using take-home COVID tests, the results of which are not generally reported to the county and added to the official total.

Another 12 new deaths were also reported, giving the county an overall virus-related death toll of 32,549.

The average daily rate of people testing positive for the virus was 16.5% as of Tuesday.

County Public Health Director Barbara Ferrer said the recent spike in infections — leading to the ultimate rise in hospitalizations and deaths — has been fueled primarily by the BA.5 variant of the virus. The variant was detected in nearly half of all local cases that underwent special testing to identify strains of the virus. The US Centers for Disease Control and Prevention estimates that the variant is responsible for nearly 70% of cases nationally.

According to the county, the average daily number of new cases reported over the past seven days was 6,742, a 24% increase from two weeks ago.

Health officials said the variants are dramatically more contagious than previous strains thanks to their ability to infect people who were previously infected with other variants, even those who are fully vaccinated and boosted.