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SAN DIEGO (KGTV) — Nearly three-quarters of the students in San Diego County are currently learning from home, and those numbers don’t make a lot of sense to MIT professor Martin Bazant.Bazant is one of the creators of the COVID-19 Indoor Safety Guideline. The free online tool simulates the fluid dynamics of respiratory droplets in various kinds of rooms to show users the risk of different indoor environments.“If you run the numbers for a typical classroom, especially if the students and the teachers are wearing masks, then the amount of time in the room can be very significant,” Bazant said. “Essentially those people could spend a week in the classroom and not have a problem.”Bazant says the six-foot rule that has largely determined which businesses can stay open is overly simplistic. In some cases, he says the rule creates a false sense of security. In other situations, he says it causes the closure of businesses or schools that could safely operate.“If you place nursing home beds six feet apart in a shared room, they are absolutely not safe,” he said. But he said well-ventilated classrooms, with teachers and students in masks, are another story.“It's only the United States where we follow the six-foot rule. That's given by the CDC. The World Health Organization all along has been saying one meter, which is about three feet. If you simply followed the one-meter rule, all our schools would be open, as they are in most of the world right now,” he said.Bazant and his colleague John Bush said they set out to design a tool that would reveal the risk of transmission based on science, not guesswork.Users start by selecting a room type, like a classroom or an airplane. From there, they can control a wide array of variables to dial in the risk, like the room size, the ceiling height, and the ventilation and filtration systems.From there, users can further tune the model by human behavior. How many people are in the room? Are they whispering, shouting or singing? How many are wearing masks?Mask usage is a critical component, Bazant says. The model quickly reveals the challenges of maskless activities in rooms with poor ventilation. Put five people without masks in a 400 square foot room with closed windows, and it becomes unsafe after 33 minutes.Bazant says studies on super spreader events show in indoor environments, the distance from an infected person doesn’t matter. Infected droplets spread and mix throughout the room like second-hand smoke from a cigarette.But with masks trapping droplets and diverting them upwards like a chimney, an environment like an airplane could be safe for several hours, according to the model. With more than 95% of the passengers and crew wearing surgical masks, a Boeing 737 could support 200 people -- around full capacity depending on the configuration -- for 18 hours. 2850

SAN DIEGO (KGTV) - Parents with students in the San Diego Unified School District are concerned after finding out the state medical board subpoenaed doctors who wrote their students medical exemptions for vaccinations.The district’s physician, Dr. Howard Taras, tells 10News, “We have many more medical exemptions over the past two years than we’ve ever had before.”Taras worked with the district for 30 years and says the increase in medical exemptions concerned him, so he brought it to the Committee on Infectious Diseases of the American Academy of Pediatrics.“I gave them loose data, like how many kids in the school district had medical exemptions that any doctor would see as a very worthwhile reason and how many were coming from doctors that were not very sound reasons in common medical practice," Taras said.The committee then took that list to the Medical Board of California. Now, parents in the district are upset knowing their child was included in a list sent to the state.“I’m absolutely appalled at the irresponsibility to have compiled this list in the first place. This is nothing that should have ever been getting out," a mother who did not want to be identified told 10News.10News learned the medical board is now investigating and has already subpoenaed 32 doctors who wrote medical exemptions for students in the district. A parent shared the letter that was sent home with their student with 10News. The letter states the information being subpoenaed includes:1. The unredacted copy of medical vaccination exemption letters 2. The name and date of birth of all children with medical vaccination exemption 3. The name(s) of the parent and/or legal guardian 4. The contact information of the parent and/or legal guardian “This is a violation of FERPA this is 100 percent unethical and I would say illegal based upon what’s taken place," a parent said.The district’s litigation specialist explains all parents have the right to seek protective action to prevent the disclosure of records. “If some of the actions that I and the medical board have taken lead to fewer medical exemptions, I really truly believe we will save people from fatality," said Taras.A representative with the state medical board responded to our request for more information saying, “The Board does not provide information on its complaints and investigations as both are confidential by law.” 2398

SAN DIEGO (KGTV) -- Police are searching for a suspect in a Serra Mesa stabbing that left two people in critical condition Saturday night.Officers responded around 7:51 p.m. to a call of a brawl outside of a house party on the 8400 block of Neva Avenue, police said. At least two people were located with stab wounds to the torso.A resident told 10News described hearing people fighting outside his home. He tried to intervene but the suspect disappeared.“I rushed out to see if I could stop them from doing anything and by the time I think they already left the scene," said Turk Sapta.The unidentified victims were transported to a local hospital in critical condition, police said.No description of the suspect or suspects was given at this time.Stay with 10News for updates to this developing story. 813

SAN DIEGO (KGTV) -- On Saturday, March 17, the San Diego Blood Bank will partner with Westfield and ABC10 to host "The Gift of Health" event across San Diego County. The event takes place from 11 a.m. to 4.p.m. at Westfield Plaza Bonita, Westfield North County and Westfield Mission Valley.Those who attend will be able to donate blood while also enjoying fresh snacks, wellness tips, fitness activities along with products and demos to help live a healthier life.Donors are encouraged to make an appointment, but walk-ins are welcome. To make an appointment, click here. All those who give a blood donation will also receive an “Aspire to Something Higher” T-shirt.Check our map below for a list of locations: 728

SAN DIEGO (KGTV) -- Officials say more than 80 people are currently being monitored for coronavirus symptoms in San Diego County, as the first flight of quarantine passengers from a cruise ship arrived at MCAS Miramar Tuesday. A group consisting of between 50-60 people arrived at MCAS Miramar just before 10 p.m. Tuesday for a 14-day quarantine. The passengers had been aboard the Grand Princess cruise ship that was brought to Oakland.All passengers have been screened and showed no symptoms, County Public Health Officer Dr. Wilma Wooten said, adding that about 400 more passengers were expected to arrive at Miramar on Wednesday.The cruise ship reported at least 20 people infected with coronavirus aboard the ship, before it was directed to dock in Oakland after spending about a week awaiting orders off California's coast.RELATED: San Diego County woman tests positive for coronavirus following overseas travelAbout 900 California residents who were aboard the ship will be repatriated through MCAS Miramar and Travis Air Force Base in Northern California, according to Wooten. MCAS Miramar confirmed the arrival late Tuesday and larger group expected Wednesday.In a statement, MCAS Miramar Commanding Officer Col. Charles Dockery said the U.S. Department of Health and Human Services is leading the local quarantine effort on the base."As with the previous mission, all passengers entering quarantine will have been deemed asymptomatic by health care professionals. Passengers will remain quarantined throughout the 14-day period and there will be no contact with DOD personnel. Finally, any person that tests positive for COVID-19 will be transferred off-station," Col. Dockery's statement read.San Diego is currently monitoring 73 travelers from China and Iran for coronavirus symptoms, according to the county. Since Feb. 6, 448 travelers have been monitored, with 375 travelers clearing their quarantine period.Currently, 11 non-travel related individuals in San Diego County are being monitored: Nine who had contact with an Orange County patient who works in Chula Vista and two people who had contact with a travel-related coronavirus patient who lives in San Diego County. RELATED: Santa Clara County announces first coronavirus deathThe woman, who is in her 50s, was at the hospital for another reason before she was discharged and felt ill again, the county said, and is currently doing well. The number of healthcare workers who had contact with the local patient is still pending, according to the county.There are currently 23 patients under investigation (PUI) in San Diego County. The county adds that 63 resident PUIs, six non-resident PUIs, and four CBP/ICE detainee PUIs have tested negative for the virus.RELATED: Grand Princess cruise ship passengers to be quarantined at MCAS Miramar amid coronavirusCounty leaders said that they believe the risk to the general public remains low.Around the county, homeless outreach teams plan to distribute hygiene kits and deploy hand washing stations around the county. If someone in a homeless shelter needs to be isolated, the county said they'll follow CDC guidelines in treating the individual.Hand washing stations will be installed at trolley stations, but it will largely be up to individual cities where they are placed.Symptoms of coronavirus are similar to that of other seasonal illnesses and include fever, cough, and shortness of breath or difficulty breathing. Anyone with questions surrounding the virus is encourage to call the county's hot line at 2-1-1. 3546