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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) -- Authorities responded to reports of a California Highway Patrol Officer who crashed his motorcycle in Rancho Bernardo Thursday evening. According to the San Diego County Sheriff’s Department, the crash happened on northbound I-15 at Rancho Bernardo Road before 6 p.m. At this time, the cause of the crash is unknown. It’s also unknown whether or not the officer was injured in the crash. 416

SAN DIEGO (KGTV) — Construction began Friday on SeaWorld's next big attraction for the park, billed as California's tallest, fastest, and longest dive coaster.The first phase on the dive coaster started in conjunction with National Roller Coaster Day, as crews prepared the coaster site for the ride's foundation and utilities. The coaster will be located adjacent to the park's Journey to Atlantis attraction in the southeast corner of the park.SeaWorld previously said the ride would be called "Mako," after the endangered species of shark. Now, the park says the name is up in the air with several options being considered, City News Service reported.RELATED: SeaWorld San Diego offers end-of-summer saleThe coaster will climb 153 feet, leaving riders' feet dangling in the air. At the crown of the attraction, riders will be suspended on a 45-degree angle before diving 143 feet at more than 60 miles per hour. For two minutes, riders will zip through inversions, a barrel roll and Immelmann loop, hammerhead turn, and flat spin along 2,500 feet of track. Each car will hold 18 riders in three, six-person rows.Aquatic education will play a role in the attraction as well. SeaWorld plans to partner with a conservation group to focus on the ride's conservation efforts.Switzerland-based Bolliger & Mabillard, which built SeaWorld Orlando's Kraken and Mako rides, will construction the San Diego coaster.SeaWorld plans to open the coaster to the public in 2020. 1476

SAN DIEGO (KGTV) -- Caltrans presented five renderings of possible suicide barriers for the San Diego-Coronado Bridge.More than 400 people have killed themselves by jumping from the bridge since it was opened in 1969, making it the second deadliest suicide bridge in the nation behind San Francisco’s Golden Gate Bridge.The possible suicide barriers include a large net underneath the bridge similar to the one to be put on the Golden Gate Bridge, three types of fencing, or 18-inch spikes on top of the existing barriers.Caltrans said one design will be chosen in Spring 2018.They said it will take several years to build the barrier because they need to have environmental impact studies done and get funding for it.  752

SAN DIEGO (KGTV) -- Barrio Logan businesses are moving outdoors on Saturday in hopes of bringing in some revenue. The businesses are hosting the first Walk the Block, which will include outdoor dining, live music and shopping. The business were struggling because of pandemic closures and they tell ABC 10News that they decided to get permits to be able to serve and sell to customers outdoors. All social distancing and mask rules will apply. Walk the Block will go on from 12 p.m. to 7 p.m. from Chicano Park to 26th Street. 536

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