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SAN DIEGO (KGTV) — San Diego County health officials say the county’s contact tracing program has not been hampered by the same issues plaguing efforts in other areas like New York City, but there may be blind spots in the county’s data.One of the keys to successful contact tracing is eliciting a full list of close contacts from an individual who tests positive. A “close contact” is defined as someone who was within 6 feet of an infected person for at least 15 minutes, beginning 48 hours before illness appeared and lasting until the patient was isolated.It’s sensitive work, but the breadth of that list is critical to suppression efforts. “By identifying or ‘tracing’ the contacts of people infected with COVID-19, we can identify other individuals who might be infected, test those individuals for infection, treat those who are also infected and trace their contacts as well,” the county says on its website.However, in New York City, only 35% of the residents who tested positive actually provided information about their close contacts to tracers during the first two weeks of June, the New York Times reported.That means that even if tracers were able to reach virtually all of the individuals on their list, they would still likely have a vastly incomplete picture of those who may be at risk.That’s where San Diego’s first potential blind spot comes in. Unlike New York City, San Diego County is not actively monitoring the percentage of individuals who provide information on close contacts to tracers, County Medical Director Dr. Eric McDonald said Monday.“We don’t specifically follow that metric,” he said. “We think we’re probably doing better than the numbers you hear from New York. It’s difficult though for us to drill down on that specifically.”Instead, the county bases one of its triggers on attempts to reach the close contacts it has on file, regardless of how complete or incomplete that list may be, and regardless of whether tracers actually got in touch with those individuals -- a second potential blind spot.McDonald acknowledged that tracers are often given out-of-date or inaccurate contact information, and must rely on public records and other sources to try to reach out to close contacts.As of Monday, the county had attempted to contact 87% of known close contacts within 24 hours, well above the county’s goal of 70%.“I think we’re doing pretty well from the contact tracing perspective,” McDonald said of that metric.“I would say the general gestalt from talking to our contact tracers is that most individuals are actually quite cooperative and do give as best information as they can about close contacts. And we really do appreciate that,” he added.McDonald said that staff would reexamine the county’s database in light of the inquiry by ABC 10News, and on Tuesday a spokeswoman provided an update. “Approximately 60 percent of our cases identify one or more close contacts,” said communications officer Sarah Sweeney.Assuming that every person who tests positive has at least one close contact, it means San Diego County disease detectives are placing calls to -- at most -- 52% of close contacts within the first 24 hours.McDonald said while that tracers do not get close contact information from everyone, there are circumstances when a close contact is simply a household member and has no other unique close contacts to follow up on.“Some close contacts don’t need to be identifying any other close contacts,” he said. “Overall, I would say that our cooperation is good to excellent.”From May 4 to May 28, people who tested positive in the county identified an average of 2.2 close contacts, County Public Health Officer Dr. Wilma Wooten said at a Board of Supervisors meeting earlier this month.Whether tracers actually reach those individuals is another story.“I’m a person who thinks it would be great to have perfection: every single person telling us every single thing that they know. But I think that we are doing very well from the information we are getting from our close contact investigations,” McDonald said Tuesday. 4089

SAN DIEGO (KGTV) -- San Diego Gas and Electric says more than 21,000 residents could lose power amid a coming Santa Ana wind event.The company said Saturday it notified thousands of residents about the possibility of power outages to reduce wildfire risk both Monday and Tuesday.The outages could take place in south Orange County and north San Diego County. Click here to see a map of areas that could be affected.“The National Weather Service has issued a Red Flag Warning for inland Orange County for 2 a.m. Monday through 6 p.m. Tuesday, and it has indicated that ‘any rainfall that occurs this weekend will not delay the fire weather potential for very long on early Monday,’” the company said.SDG&E says most Santa Ana winds come from the east and sweep through San Diego County’s backcountry. This event, however, is forecast to come from the north, affecting urban and coastal areas that don’t normally see public safety power outages.“Within SDG&E’s service territory, the strongest winds are expected overnight Sunday through Monday in the San Clemente and east San Juan Capistrano areas in south Orange County and the Camp Pendleton, Oceanside, Pala Reservation and Fallbrook areas in north San Diego County,” SDG&E said.Drive-thru community resource centers will be available starting at 8 a.m. Monday at the Fallbrook Branch Library, 124 S. Mission Road, Fallbrook, and Vista Hermosa Sports Park, 987 Avenida Vista Hermosa in San Clemente.Due to elevated fire weather conditions and forecasted Santa Ana winds coming from the north, we have notified ~21K residents that we may turn off power to reduce wildfire risk Mon. & Tues. in south Orange County and north San Diego. Learn more at https://t.co/Nu4yeSS2Bp pic.twitter.com/RaGtZlS8dq— SDG&E (@SDGE) October 25, 2020 1811

SAN DIEGO (KGTV) -- San Diego is expecting cooler temperatures this week, but another heatwave isn't far behind. Local air conditioning companies have been swamped with service calls. Philo Mitman is a service technician with ASI The White Glove Guys."When this heat does come, our call volume is tripled, quadrupled cause everyone needs it now," said Mitman. Mitman said it's important to replace filters, possibly every month, depending on use. "A dirty filter is the biggest thing as a homeowner that can cause bigger issues because if that is neglected the big motors can get seized up, they can overheat , you can block coils off which causes big, big problems," said Mitman.Another common mistake, according to Mitman, is closing vents. "Common misconception is that people close vents off to save money, when in fact, it actually costs you more money when you do that because your system is designed for a certain amount of air flow to be delivered to the home and if you start cutting that off , the system tries to make up for that so it works extra harder," said Mitman. Mitman also suggests testing the system before it's needed."Run some stuff, it's like an old car, you can't just let it sit forever you gotta test it out." 1244

SAN DIEGO (KGTV) — San Diego County is seeing far fewer influenza cases at this point in the flu season compared to last year, due in part to coronavirus-related safety measures, according to public health officials.So far this season, the county has recorded 39 influenza cases, compared to 1,220 cases at this point last season. Flu season generally runs from October through May, with flu activity peaking in December and February.The county says it's "very likely" physical distancing, hand washing, and mask-wearing are contributing to the low flu activity."Influenza activity remains very low to date this season in San Diego County. This is very likely due to the social distancing, hand washing, and mask-wearing interventions instituted to reduce the transmission of SARS-CoV2, the virus that causes COVID-19," the county's influenza report said. Health officials say influenza vaccination rates are also contributing to the lower numbers. So far this season, 1,043,552 San Diegans have been vaccinated for the flu. Last season, a total of 1,234,474 flu shots were administered. 1095

SAN DIEGO (KGTV) - San Diego photographers are taking advantage of the serene and luminous glow of the surf this week.Eerie neon blue waves have been seen against San Diego's shore this week, creating some rare photo opportunities for locals. The phenomenon is created when a red tide, which is algae bloom filled with phytoplankton called "dinoflagellates," rolls off waves onto or near the shoreline.The organisms react with a bioluminescent chemical reaction when jostled as a way to warn predators, to lure prey, or communicate within their species. The blue glow can be created by a simple step in the water or crash of a wave.IN SAN DIEGO...The current red tide is being caused by massive numbers of dinoflagellates including "Ceratium falcatiforme" and "Lingulodinium polyedra," according to the Scripps Institution of Oceanography at UC San Diego.Researchers do not know how long this current red tide will last or "the full spatial range of the bloom." In the past, blooms have lasted anywhere from a week to a month or more.RELATED: 1110