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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) — Border Patrol agents say they found human remains in the Tijuana River Valley early Saturday.The agents discovered the human remains near the Tijuana River just before 8:20 a.m. on Dairy Mart Road and Clear Water Way, according to City News Service and Chief Patrol Agent Douglas Harrison.The investigation was turned over to the San Diego Police Department's homicide detectives. 10News has reached out to San Diego Police, but have yet to hear back.No further information was immediately available.City News Service contributed to this report. 572

SAN DIEGO (KGTV) -- Authorities are searching for a woman who disappeared while driving from San Diego to Victorville nearly two weeks ago. According to the San Bernardino Sheriff’s Department, 53-year-old Izetta Burney went missing on November 24. Burney disappeared while driving home to Victorville after visiting a San Diego spa, a friend tells 10News. According to the friend, Burney’s phone goes straight to voicemail and her credit cards and bank account show no signs of activity. Burney was last seen in Victorville driving a black 2008 four-door BMW with California license plate number 7EXG207. She is described as five feet, 11 inches tall with a tattoo on her right arm and a mole above her lip. She was last seen wearing a black top and black spandex pants. Anyone with information is asked to call the San Bernardino Sheriff’s Department at 760-552-6800 or 911. 885

SAN DIEGO (KGTV) -- Black history in San Diego goes back hundreds of years, but a unique aspect specific to the area is a historic building that no longer stands. At the intersection of Market and 2nd in downtown, there is a small plaque on the ground. This marker is all that’s left of the historic Hotel Douglas, a place founded in the Roaring 20s that became an icon for the area.George Ramsey founded Hotel Douglas in 1924 as a place for the black community. During this time, segregation was prevalent, and many hotels were whites-only. Ramsey created the hotel as a way to give a space and economic boost to black people.“He had the idea of creating a black hotel. When I say black hotel I mean a hotel run by black people, owned by black people, employing black people, serving black people,” said David Miller, a history professor who also works with the San Diego History Center.Miller said the hotel became a famous spot because of the nightclub inside that drew in many famous black performers, including Bessie Smith and Duke Ellington, who would stop on their way to shows in neighboring major cities.“San Diego was a stopover point so the club in the hotel became a center for black performers and in fact became dubbed the Harlem of the west,” said Miller.The hotel no longer stands, but the plaque marks the history it represents. Miller said this history, similar to other major black history days like Juneteenth, is important to know and understand to grow as a society.“It’s a chance to truth tell and to learn about not necessarily a moment in history but a moment in history that illustrates the ongoing nature of making freedom and navigating what freedom means now as free people,” he said.The San Diego History Center will reopen to the public July 4, 2020 after closures due to coronavirus. There are also resources available online to learn more about local history. The museum will also have an exhibit on Nathan Harrison, a legendary African American San Diego homesteader, in spring 2021. The display was delayed due to COVID-19. 2067

SAN DIEGO (KGTV) - Crowds have been sparse at Balboa Park since the start of the coronavirus pandemic, but that doesn't mean the park hasn't been busy."The change in Balboa Park is evident. The change in Balboa Park is important," says Peter Comiskey, the Executive Director of the Balboa Park Cultural Partnership.Comiskey says nearly every museum in the park has used the unexpected downtime to refresh their exhibits or renovate their facility. That includes large-scale renovations at the Timken and Mingei Museums."While they've been closed, they've been taking advantage of, in some cases, completely removing all of their pieces and reworking their entire buildings," says Comiskey.RELATED: Observation Wheel could bring people back to the parkBut it's not just museums. The 100-year old carousel is getting refurbished. Crews are almost finished building an observation deck around the Morton Bay Fig Tree. Five new cottages in the International Village are about to open up, housing 9 new cultural groups. And the City of San Diego is finally doing a lot of deferred maintenance on water and sewer lines.RELATED: Carousel work continues through PandemicThe biggest difference and the biggest projects are underway in the park's South Palisades area. Work is almost complete on a brand new pedestrian plaza, replacing half of the parking lot in front of the Air and Space Museum.RELATED: City to replace 144 parking spaces with plazaNext to the plaza, the Comic-Con Museum still plans a grand opening in the summer of 2021 in the building that used to be the Hall of Champions.And the Save Starlight group just revealed new plans for a complete overhaul of the Starlight Bowl theater, which has been closed since 2010."The placement of the museum in that area couldn't have been any better," says Melissa Peterman, the VP of Development for the Comic-Con Museum. "We want to do our part to help elevate the Palisades and revitalize it in the way that Plaza de Panama was."The pandemic allowed the Comic-Con Museum to get a head start on their online offerings, while still working on building renovations and exhibit planning.The Starlight plans show new terraced lawn seating, nature gardens, walking trails, and smaller stages surrounding the main bowl.Save Starlight President Steve Stopper says work is already underway on some of the smaller parts of the renovation, so they can build excitement over the coming months."It creates a window for people to get behind the idea," he says. "They can see this is really viable for the future."Stopper says it's an exciting time to be around the park, as it adds more gems to the Crown Jewel of San Diego. 2669