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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) - Conflicting instructions on the California mail-in ballot have confused some voters when it comes to signing their envelope."I laid it all out, and I looked at it and said, 'This doesn't match,'" says San Diego resident Theresa Lally. "It was red flags all over for me."The confusion comes from two separate instructions on how to sign your ballot envelope before submitting it. On the envelope itself, it says your "signature must match your voter registration record." But on the Voter Instruction form that comes with the ballot, it says, "Sign your name just like it appears on your driver's license or identification card."Lally says she can't remember how she signed her voter registration, and she wasn't sure if the instructions meant to include her full name or if she could just use a middle initial.ABC 10News took her concerns to Michael Vu, the San Diego Registrar of Voters. He says voters shouldn't stress over specifics, because the law allows for a fairly liberal interpretation of a signature."You do not have to have an exact match of your signatures," says Vu. "What we're looking for are the unique characteristics of a signature."Because signatures change over time, Vu says the people who verify each signature look at identifying markers to match the signature on the envelope to the signature on file."We look at the way that a person slants their signatures," Vu says. "Or the way that they loop their L's or J's or S's. Or how they may have a tail at the very end of their signature."He also says just initials can be enough to make a comparison and verify a signature.If none of that matches, Vu says the ballot goes into a "curing" process. The Registrar will have the voter fill out an affidavit that the office uses to verify the signature.And if a voter makes a mistake on their signature, Vu says they can contact the Registrar's office for a replacement ballot.Mail-in ballots must be postmarked by November 3 and received within 17 days to count. In-person voting begins October 31 at 235 "Super Polling" locations throughout San Diego County. 2105

SAN DIEGO (KGTV) — Chris Cate may soon feel like the loneliest politician in San Diego.Come December, he'll likely be the only Republican on the otherwise Democratic San Diego City Council. That’s because it appears Democrats will secure an 8-1 advantage on the City Council, based on returns from Tuesday’s election.“We'll have to figure out a new path going into election two years from now and another election two years after that,” Cate said.Cate is a San Diego native who represents the city's North Central areas. The jobs are technically nonpartisan, but divides do show when it comes to key votes on housing development, city contracting, and public safety. Cate says he won't be shy.“And really try to ensure that we as a government are mindful of the fact that we rely on taxpayer dollars to provide those resources, and not try to go back to the well multiple times to increase fees or taxes,” Cate said.Cate describes himself as a fiscal conservative and social moderate. He joined the council in 2014, when Democrats had a 5-4 advantage over Republicans. Democrat registration has exploded since then, with some politicians abandoning the Republican Party.Termed out Councilman Mark Kersey is now an independent, and State Assemblyman Brian Maienschein flipped to a democrat.But Cate says he'll never leave the party.“Absolutely not… 100%, no,” he said.Being the lone Republican on the council could also raise Cate’s political profile. For instance, many times he'd be the only alternative viewpoint for journalists to ask for comment. Cate said, however, that he's not seeking higher office. He terms out in 2022.Cate said more than 90% of the issues the council takes up are nonpartisan. He added he has known leading Democratic mayoral candidate Todd Gloria for years and finds him to be a person of integrity. 1836

SAN DIEGO (KGTV) - Border officials say they have received enough funding to replace 100 miles of border fencing along the U.S.-Mexico border.The Trump Administration will put forth about .6 billion through the 2018 Congressional appropriations.  The new border wall provides a comprehensive system of wall, lighting, and technologies, Acting Commissioner Ronald Vitiello said during a press conference Friday.In San Diego, a total of 28 miles of border barrier will be replaced. Fourteen miles of "dilapidated" border wall constructed with landing mats will be replaced with new steel bollard wall, according to Vitiello. Another 14 miles of secondary barrier inside San Diego will also be replaced.RELATED: President Trump says San Diego 'desperately' wants a border wall while touring prototypesIn Calexico, officials are on schedule to build a new 30-foot high wall, replacing two miles of pedestrian barrier, Vitiello said."We appreciate this down payment for our needs," Vitiello told reporters but added the appropriations do not fully fund their needs in other critical locations.The wall system being installed will not utilize the prototypes President Donald Trump recently visited the San Diego area to inspect. Instead, the replacement walls will use design standards that have already been approved.RELATED: Trump suggests US military foot the bill for border wallBorder officials are in the process of developing new design standards from the eight prototypes built in Otay Mesa. It's not clear when those standards will be established."We've learned a lot from the prototyping process," Vitiello said. "Those attributes in some of those prototypes will be apart of a new design standard." 1783

SAN DIEGO (KGTV) — California public health officials said Friday that the state's ICU capacity dropped dangerously low, prompting warnings to take the latest regional stay-at-home order seriously.The Office of the Governor announced on social media that, "there is less than 10% ICU capacity remaining statewide. We are at a critical moment. Calling all Californians - stay home & wear a mask to save lives. All hands on deck with our health & emergency teams as we address the capacity crisis."The state also broke a single-day record for new COVID-19 cases with 35,468 cases on Friday, and reached a new high in hospitalizations, with 12,013 patients, and ICU cases, at 2,669, Los Angeles ABC affiliate KABC said.RELATED: San Diego hospitals lay out plans to distribute vaccines to staffFriday, the state's COVID-19 data showed California's ICU capacity at 9% and a seven-day average 8.4% positivity rate. The Southern California region, which includes San Diego County, currently sits at 6.2% ICU capacity. The figures, however, don't necessarily give a real-time picture of staffed beds available since the state adjusts the percentage based on the ratio of COVID-19 positive and non-coronavirus patients.California's regional stay-at-home orders covered 36 counties, or about 77% of the state, as of Friday.Friday, FDA officials are expected to approve Pfizer's coronavirus vaccine for distribution. According to the CDC, front line medical workers are among the first set to receive the vaccination. 1522

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