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SAN DIEGO (KGTV) — As temperatures warm up, there is some early research suggesting air conditioning units could increase the risk of spreading COVID-19.One team of researchers swabbed several kinds of air conditioning units and found traces of the virus on one out of every four samples.One of the authors, University of Oregon professor Dr. Kevin Van Den Wymelenberg, said the research “does give us some pause.”Air conditioning units bring in little outside air, particularly when temperatures are very hot, posing a risk that viral particles could be recirculated into rooms, Van Den Wymelenberg said.However, just because the study found traces of the virus in A/C units, it doesn’t prove people can actually get sick from the contaminated air because it’s not yet clear how many viral particles it takes to infect someone, he noted.“Nobody knows what that minimum threshold is so we need to take as many precautions as possible,” he said.Dr. Edward Nardell, a professor in the Departments of Environmental Health and Immunology and Infectious Diseases at the Harvard T.H. Chan School of Public Health, said air conditioning units can generate air currents that can carry large particles farther, similar to what researchers found contributed to the spread of the novel coronavirus disease in an air-conditioned restaurant in Guangzhou, China."You are not socially distanced as much, but you're re-breathing the same air that someone else just exhaled," Nardell said. "We call it rebreathed air fraction, and if someone is infectious, often asymptomatic, you're going to be rebreathing their small particles."This week, a group of 239 scientists from 32 countries asked the World Health Organization to update its COVID-19 guidance to reflect that the virus is airborne.On Thursday, the WHO released updated guidance acknowledging that airborne transmission can’t be ruled out, but stopped short of confirming that the virus spreads through the air.Instead, the WHO said the virus primarily spreads through droplet transmission, where larger particles come out of an infected person’s mouth, then fall quickly to the ground or onto surfaces. In airborne transmission, the particles stay floating for a long time.“I think they’re underweighting the importance of this airborne route based on the best available information,” said UC Berkeley Professor Emeritus William Nazaroff, one of the signatories of the letter to the WHO.He said in a poorly ventilated room, particles might linger for 30 minutes to an hour.Scientists say one of the best ways to protect yourself is to open windows, to increase the circulation of fresh air.Scientists say upgraded air filters in AC units and standalone air purifiers could also help.Germicidal lamps may also be effective, Nardell said. The technology is almost 100 years old, and has been proven effective in protecting against tuberculosis infection.The lamps, which shine ultraviolet light, are set up to shine horizontally, high up in the room to kill floating pathogens.Nardell said the technology can be deployed cheaply and easily in a number of settings.Additional reporting by Lauren Rozyla at WFTS 3159

SAN DIEGO (KGTV) — Boomers! has announced it will close its Kearny Mesa and El Cajon locations, after being shuttered in March due to the coronavirus.The local family entertainment centers announced online that they would close, though season passes, play cards, and "Boomers Bucks" will be honored at Apex Parks Group's eight other properties, including Irvine, Modesto, Santa Maria, Livermore, Calif.10News reached out to Boomers! Vista on whether that location would reopen in the future and have yet to hear back.RELATED: Gyms, other businesses begin preparing for California's June 12 reopening dateSan Diego Zoo hopes to reopen in 'coming weeks' under new limits"We apologize for the inconvenience. If you prebooked an experience prior to the COVID-19 closures a representative will contact you directly," the closed locations' websites read.Upon closing due to COVID-19, parent company Apex Parks said it was also going through "comprehensive financial restructuring and sale of the company," resulting in it filing for Chapter 11 bankruptcy.This week, the state offered guidance for approved counties to reopen family entertainment centers amid the coronavirus pandemic. 1186

SAN DIEGO (KGTV) — Consumer spending in San Diego was down nearly .3 billion between February and April 2020, showing just how badly the COVID-19 pandemic crippled the local economy.Since stay-at-home orders began in March, SANDAG says taxable sales in the region dropped from an average of .3 billion to billion in April.The largest losses in the region were seen at apparel stores (an 83% decrease in sales) and restaurants (down 67%).On the other side, big-box retailers like Costco, Target, and Walmart have fared well, SANDAG says. Grocery stores and pharmacy, though, were actually down 10% in taxable sales. Home improvement sales were also up, likely due to stimulus checks, SANDAG adds."It is interesting to learn that grocery stores and pharmacy sales are actually down by 10%, while home improvement sales have spiked," said SANDAG Chief Economist Ray Major. "We can assume that during the pandemic, people had more time to work on outdoor landscaping, gardens, and other home beautification projects. Plant seed companies also saw increases-- nearly four times their average sales."Consumer spending among online retailers like Amazon increased 35% as well.SANDAG's report estimates that consumer spending will continue to be down through August, though slightly less each month. 1306

SAN DIEGO (KGTV) - Cleanup is underway after a driver went on a rampage, hitting three cars before crashing into an apartment building in North Park.  "I heard just a really loud bang noise and I felt the apartment shutter," said Laura C, a resident in that building.It started when police say the 60-year-old driver hit an electrical box while getting on the 805 southbound from El Cajon Boulevard. He went down an embankment and continued south before crashing into a car on the highway. The driver kept going and got off on University Avenue. That's when he crashed into two more cars and a pole near Boundary Street. He then put the car into reverse and plowed through a gas station and into the apartment building wall. "Out of nowhere he just went full blast in reverse until that building stopped him," said witness, Vicki Nikbakht. Police believe the driver may have been under the influence of drugs. Residents were evacuated in fear that the building would collapse. The driver was taken to the hospital with minor injuries. No one else was hurt.  1110

SAN DIEGO (KGTV) — Border officials seized nearly two tons of drugs valued at millions of dollars at San Diego and Imperial Valley ports of entry last weekend.Between June 14 and June 16, Customs and Border Protection says more than 2,638 pounds of marijuana, 1093 pounds of methamphetamine, and five pounds of heroin were seized after being discovered inside doors, flooring, and other areas of vehicles and a tractor-trailer.In one instance, agents at the Calexico Port of Entry stopped a 34-year-old driver on Friday and referred the driver to a secondary inspection. There, canine agents made a positive detection and the port's imaging system discovered anomalies inside the vehicles flooring.Agents uncovered 40 packages of methamphetamine hidden in the vehicle.The same day, a tractor-trailer was stopped at the Otay Mesa Port of Entry, arriving from Mexico with a shipment listed as "watermelons and cactus." An officer referred the driver to a secondary inspection, where a canine officer alerted agents to a positive detection in pallets of watermelons.Agents found 311 packages of marijuana, worth an estimated ,557,000, intermixed with the fruit.During another incident on June 16, agents at the San Ysidro Port of Entry stopped a 35-year-old man where a secondary inspection revealed 86 packages of methamphetamine, with a street value of 3,700.All drivers were turned over to Homeland Security agents for processing and all vehicles and narcotics were seized by CBP. 1494