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SAN DIEGO (KGTV) — It took a mere two days for San Diego's dockless scooter war to become that much more interesting.Thursday, ride-sharing service Lyft launched its own dockless scooters in San Diego, a day after competing company Uber released about 300 of its own scooters into the city.Much like Uber's JUMP scooters, Lyft allows riders to access scooters through its mobile app to reserve a scooter or unlock one on the spot. Lyft also charges to unlock its scooter and SAN DIEGO (KGTV) — In their push to reopen schools, some political supporters of President Donald Trump have cited COVID-19 research from a group of San Diego scientists, claiming it’s evidence we could be close to herd immunity from the virus.But one of the authors of that research says that conclusion is way off.One of the most prominent supporters of the herd immunity conjecture is Dr. Scott Atlas, a neuroradiologist and senior fellow at Stanford University’s Hoover Institution who became an adviser to President Trump this month.“There’s a pretty good chance that herd immunity requires way less infections because of existing immunity out there,” Atlas said in a livestream conversation with San Diego County Supervisor Jim Desmond. “It actually may have already been reached in places like New York. We don’t know, but it’s possible.”Herd immunity is the level of protection needed to effectively stop the virus from circulating, thought to be about 70 percent of the population. The “existing immunity” to which Atlas is referring has to do with T cells.“It's just a misunderstanding of the science,” said Dr. Shane Crotty, a virologist at the La Jolla Institute for Immunology who co-authored the groundbreaking research on T cells in June.Crotty and his colleagues found that 50 percent of people unexposed to the novel coronavirus had T cells that could recognize it. Scientists refer to this as cross-reactive T cells, and the study was replicated in other countries.Proponents of the herd immunity theory take the number of people infected with the coronavirus, add the number of people with T cells that can recognize the virus, and come up with a number around the herd immunity threshold of 70 percent. But the math doesn’t work that way, according to Crotty, in part because T cells only kick in once a virus has hijacked cells, meaning T cells alone can't stop a pathogen in its tracks.“We’re not saying those 50 percent of people have protection like they’ve already had the virus,” Crotty said. “We’re saying those 50 percent of people have a head start in responding to the virus, which is a good thing but doesn’t affect herd immunity.”Since the novel coronavirus is a new pathogen, scientists did not expect people would have tools in their immune system capable of recognizing it. Unexposed people do not have cross-reactive antibodies, Crotty said.But in a study published this month in Science, Dr. Crotty and his colleagues offered a potential explanation for the surprising T cell results: they found these cross-reactive T cells also recognized four other coronavirus strains that cause common colds.Their theory: the T cells were created in response to other coronaviruses but can recognize SARS-CoV-2 like a distant relative.“It's a memory of a cousin,” Dr. Crotty said.That memory may speed up the body’s immune response, which can normally take about a week for an unknown pathogen, Crotty said. But scientists aren’t sure yet what role T cells actually play in clinical outcomes.“We have no data and and neither does anybody else as to whether these T cells really help or not,” Crotty said.To answer that question, scientists would need blood samples for lots of healthy people and then they would have to closely study individuals who got infected.The La Jolla Institute for Immunology is raising money for that kind of research, Crotty said, but they’re not there yet. 3417.10 every minute to ride.RELATED: Uber introduces reservable e-scooters to San Diego's dockless transportation mixLyft adds that the company will donate for every scooter ride to Circulate San Diego and Vision Zero through the end.“We’re thrilled to bring Lyft Scooters to San Diego and provide safe, affordable and sustainable mobility options - all within a single app,” Kyle Zuvella, Lyft market manager for San Diego, said in a release.San Diego is the third Southern California city to receive the Lyft scooters and joins Uber in competing for riders with Lime and Bird scooters, which have operated in town since early this year. 1151

SAN DIEGO (KGTV) -- Many families throughout San Diego County are struggling due to the coronavirus pandemic, making the otherwise cheery holiday season less than ideal.Despite hard economic times, many throughout the region are finding ways to give back in 2020.Although volunteering may look different this year, there are plenty of opportunities to help out, from donating to food banks to fostering an animal.Feeding San DiegoNot only can you donate to help feed families, students, and seniors in need through Feeding San Diego, but your help also keeps the group's food distributions running and supports mobile pantries.And with ABC 10News, you can help us provide millions of meals to San Diegans during our Month of a Million Meals through Dec. 31. Last year, the campaign raised more than 5.1 million meals. Learn how you can help here.San Diego Food BankThe San Diego Food Bank has more than doubled the number of people it’s providing food assistance to during COVID-19. From mid-March through October, the organization distributed more than 37 million pounds of food. The food bank says all volunteer shifts have been booked through the fall, but you can still sign up to volunteer at a later date here. You can also donate money. The organization says for every given, 5 meals can be provided.Father Joe's VillagesHelp support Father Joe's Villages and provide aid to individuals battling homelessness in San Diego. Donations can help provide housing, meals, health care, and education to those in need locally. Anyone interested can donate money, goods, a vehicle, or their time to help. Learn more about how to help.The Salvation ArmyIt wouldn’t be Christmas without the famous Red Kettles. However, this year, the organization is taking its campaign online. With a few mouse clicks, you can help the Salvation Army support bill assistance, homeless shelters, and food pantries across San Diego. To donate to the Red Kettle Campaign online here.And despite the pandemic, The Salvation Army is asking volunteers to answer the call and become a Christmas Kettle Bell Ringer. Click here to sign up.San Diego Humane SocietyThe Humane Society has temporarily suspended its volunteer recruitment and onboarding due to the coronavirus, but that doesn’t mean you can’t give back. The organization is still accepting donations. Donations will help the group provide medical care, shelter, and food to homeless animals. Of course, pet adoptions are still running this season as well. You can also sign up to foster a pet. Visit the humane society's website to learn how to adopt or foster a pet, or donate.Red Cross San DiegoYou can also help the Red Cross San Diego's humanitarian and disaster relief efforts for those in need. Donations with help support safe shelters, hot meals, care, and comfort for people who have lost everything to a disaster.The Red Cross is also supporting the critical need for blood during this time. Click here to learn how you can donate blood.San Diego Blood BankThe San Diego Blood Bank is in need of volunteers to donate blood, especially during the holiday season. The bank aims to collect more than 350 units of blood each day in order to meet the needs of local patients who are battling life-threatening conditions. One pint of blood can save up to three lives. You can sign up for an appointment here. 3357

SAN DIEGO (KGTV) -- Memorial Day Weekend DUI arrests are down in San Diego County compared to last year, according to California Highway Patrol. In San Diego County, 42 people were arrested between 6 p.m. Friday and 6 a.m. Sunday. By this time on Memorial Day Weekend in 2018, 57 people were arrested. One person died this weekend in San Diego County due to a DUI crash, tying it with last year. Statewide, 741 people have so far been arrested for driving under the influence. By this time last year, 674 people were arrested for DUI. So far this weekend, DUI-related crashes have claimed 18 lives throughout the state compared with 14 by this time last year. 668

SAN DIEGO (KGTV) -- It’s no mistake, the Marriott Marquis in Downtown San Diego is playing host to bees on the roof, and it’s all for the benefit of local business. The hive highlights a growing trend called urban beekeeping and the popularity of the practice is creating a lot of buzz. In 2012, the City of San Diego amended its municipal code to allow some residents, along with community gardens and retail farms to keep two beehives. The practice has several benefits, according to the city, including access to fresh, natural honey. The city says urban beekeeping also reduces the number of aggressive Africanized bees in the vicinity of the docile honeybee hive. Beekeeping is also known to reduce carbon footprint due to local production, however, there are some things to be aware of. The primary risk of beekeeping is getting stung. The city says if you plan to keep bees, you can count on bee stings every now and then. Before deciding to keep bees, the City of San Diego urges dialogue with neighbors. Click here for more on beekeeping in San Diego. Tomorrow morning on 10News at 6, Jared Aarons looks into what benefits the bees have downtown as well as some unique concoctions local restaurants are whipping up with the fresh honey. 1254

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