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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) -- One of San Diego's biggest events of the year is here! Well, sort of. This year, because of COVID-19 restrictions, Comic-Con is not at the San Diego Convention Center. It is only happening virtually. Because of that, San Diego's hospitality industry is suffering a considerable loss.The 51st Comic-Con International is called Comic-Con @Home. This means, there are no crowds, cos-players, or lines around San Diego's Gaslamp District. The good part is that all panels are free for attendees. The bad part?"We're losing 100% of the Comic-Con business," Daniel Drane, owner of The Field Irish Pub, said.For the last 22 years, Drayne has operated the establishment on 5th Avenue, a street usually packed with visitors during the pop entertainment convention. He says every year, regulars from around the world have drinks and hold meet-ups at his bar. Not this year."We're not just losing business, but there's a loss of some of the people that we've actually known for years," Drayne said.Comic-Con's COVID-shutdown does not just impact Downtown San Diego. Its effects trickle down to the rest of the city and the county.In one week, 'the Con' usually drives in 0 million to the region and fills up almost all of the county's 64,000 hotel rooms. But now those numbers are a thing of the past."Our current strategy is a strategy of survival," Robert Rauch, CEO of RAR Hospitality, said.The hotelier says San Diego County's annual average hotel occupancy is 77%. July is singlehandedly the best month of the year, at 90%. But with COVID-19 this year, it is barely at 40%."It's deplorable to go from the best month of the year, to if it weren't for the PPP loans, we'd all be losing money this month," Rauch said.With cancellations, no business, or group travel, Rauch says San Diego's lodging industry is solely surviving on stay-cationers and a handful of leisure travelers.But as the Fighting Irish say,"You can't throw in the towel. You gotta fight back," Drayne said.Drayne is continuing his sidewalk cafe and curbside dining to make it through the dismal numbers."I hope that this COVID goes away and never returns," Drayne chuckled. "Things are going well before all of this, and I'd like to get back there again." 2247

SAN DIEGO (KGTV) - More than five percent of San Diego homeowners owe more on their mortgages than their homes are even worth, according to a new Zillow report.A total of 23,290 homes in the region are in negative equity, meaning a home's value is lower than the balances on the mortgage. About 1,906 of those homeowners owe at least twice as much as their homes are currently worth, the report says.San Diego's amount of underwater homes compares elsewhere in the state to 19,479 homes in Sacramento, 20,179 homes in San Francisco, and 46,147 in Riverside.MAKING IT IN SAN DIEGO:  604

SAN DIEGO (KGTV) - Prosecutors say streetlight camera video revealed the killer of an East Village business owner. A bevy of surveillance and streetlight video was released during the preliminary hearing for Kevin Cartwright and Lorena Espinoza, accused of killing of Tony Radda, 49.October 2018. Just before 3 p.m., store surveillance video shows a woman wearing a purple wig and sunglasses enter the store.Video shows Radda and the woman going towards the back, possibly to show her some merchandise. Right away, a man in a mask is seen trailing behind them, lurking. When Radda and the woman return, the man in the mask attacks Radda, dragging him out of camera range. Prosecutors believe that is when Radda was shot several times and killed.Soon after, the masked man is caught prying open a cash register. Prosecutors say while the woman took off in an SUV; the man walked away.According to prosecutors, that walk was captured by a string of streetlight cameras. In one of the videos - about 12 blocks away from the store - the man in the mask sheds it, revealing a face, police eventually identified as Cartwright. On Friday, the judge is expected to decide whether the two will go to trial. 1206

SAN DIEGO (KGTV) — No winning jackpot ticket was sold for the Mega Millions drawing Friday night, sending the jackpot up to 4 million — raising the combined Mega Millions and Powerball winnings to 8 million this week.Mega Millions officials said no ticket matched all six numbers for the estimated 8 million grand prize. The numbers were 4, 24, 46, 61, 70, and Mega Ball 7.Hopeful winners have until Tuesday for their next chance at the jackpot. Tickets must be purchased before 7:45 p.m.RELATED: Why you should place your bet on scratch games and not PowerballTuesday's jackpot will be the fourth largest lottery prize in U.S. history.In California, six tickets scored the highest winning amounts in the state by matching four numbers and the Mega number, for a prize of ,125.In total, 411,547 winning tickets were sold in California, for amounts between and ,125. It costs to play the game, though the odds of winning the jackpot are one in 302.5 million.Saturday's Powerball drawing will be for a 4 million jackpot. The odds of winning? One in 292 million. Players have until 7 p.m. to purchase their tickets.Looking for a lucky store? Anyone planning to purchase a ticket can find the closest retailers here. "Lucky retailers" qualify as spots that have paid out on average ,000 per week in winning tickets. You can search by your zip code, but spots in the heart of San Diego (92101) are: 1462

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