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SAN DIEGO (KGTV) — Two new studies published this week suggest people with blood type O have a lower likelihood of catching COVID-19 and developing severe illness than people with other blood types.Blood type is a characteristic we inherit from our parents and there are four major blood groups: A, B, AB and O.Danish researchers looked at nearly 500,000 people who tested positive for COVID-19 and found that people with type O were underrepresented.In a study published in the journal Blood Advances, the researchers found 38.4 percent of those infected had type O when that type actually makes up 41.7 percent of the population in that area.The researchers say the findings suggest people with type O are less likely to get infected in the first place.On the other hand, the team found that people with type A blood were overrepresented: 44.4 percent of those infected had type A compared to an expected value of 42.4 percent. The researchers suggest people with type A might be more at risk.Another study, also published in Blood Advances, looked at 95 critically ill patients in Canada. They found people with type O or type B blood tended to have a shorter stay in the intensive care unit, an average of nine days for those blood types compared to 13.5 days for people with type A or AB.They also reported that people with type O or type B were less likely to need a ventilator, with 61 percent of cases requiring mechanical ventilation compared to 84 percent for people with blood type A or AB.“Yes, there may be some of these associations. I don't think it's fully understood at this point,” said Dr. Christian Ramers of Family Health Centers of San Diego, who was not involved in the studies.The science on COVID-19 risk and blood type is mixed. These two new studies align closely with a previous study in China and another in Europe, but a third study in the U.S. found no significant link between severe COVID cases and blood type.At this point, doctors aren’t sure why blood type might affect outcomes with the disease, but there are several theories.“The immune system is an incredibly mysterious and complicated thing that we don't fully understand,” Ramers said. “Blood type sort of plays into that because people with different blood types actually have slightly different immune systems and immune responses.”Your blood type impacts the kind of antibodies you produce. That is why it is so important in blood transfusions to get the right blood type; blood from the wrong donor can trigger antibodies that attack those red blood cells.People with blood type O have two sets of antibodies, known as anti-A antibody and anti-B antibody. People with type A or B only have one or the other.Researchers in the Canadian study hypothesized that the anti-A antibody in particular may help control the coronavirus. People with blood type O and blood type B produce this kind of antibody. Individuals with type A or type AB do not.People with blood type O also have characteristics that make them less prone to issues with blood clotting, a major issue in severe cases of COVID-19.Experts say that if type O blood is protective against the virus, it’s not by a large amount.And this protective benefit doesn’t extend to all pathogens. Past studies have shown people with type O are more at risk from a type of bacteria that can cause ulcers and cholera. 3369

SAN DIEGO (KGTV) -     Earlier this week the San Diego City Council approved an environmental impact report for its new drought-proof water supply. The city likes to call it, 'Pure Water San Diego' which sounds delicious. And, for lack of a better word, it is a purified way to label the program. But some viewers don't like how we refer to it on occasion, and that's the topic of this weeks Let's Talk.  432

SAN DIEGO (KGTV) -- When entering most newly reopened businesses in San Diego County, customers will need to sign in with their name and phone number.The change only applies to businesses now offering indoor services; the county’s public health order was updated to reflect the changes now in effect for the following sectors:Hair Salons & BarbershopsPersonal Care ServicesGyms & Fitness CentersRestaurants, Wineries, Bars, Breweries, and Distilleries that serve food.“It’s a very modest step that can aide in our close contact investigation, and I think can help slow the spread and help these businesses stay open,” said County Supervisor Nathan Fletcher.Many people already give their name and phone number when making a reservation at a restaurant or booking a hair appointment; this won’t look much different, just more widespread, and businesses will also keep the sign-in sheets for three weeks.“In the event, there is an outbreak or exposure, I think most people would want to know if they’ve been exposed so they can quarantine or potentially get tested,” said Fletcher.If a COVID-19 outbreak happens, customers who visited will be notified if they were possibly exposed. The county will not collect or save the information.“It would only be used in the event there was a public health risk,” said Fletcher.Fletcher said the new plan could have possibly helped with contact tracing during the last wave or reopenings.“It’s certainly something we could have been done before, maybe a lesson learned from earlier, I think this could really aide in helping more quickly in letting folks know if they’ve been exposed," Fletcher said.Some people may have privacy concerns and be reluctant to give their personal information.Cybersecurity expert Ted Harrington, who is an executive partner at Independent Security Evaluators, says that while giving an email address would feel less invasive, the risk of providing a phone number and name is still minimal.“There’s no doubt what this order is doing is giving more information for people who don’t yet have a process to safely protect it, so we should accept that is the reality of what’s happening,” said Harrington. “But, is that a strong enough reason to not go to a restaurant or get your haircut or whatever? I wouldn’t be any more concerned than you might normally be with giving your phone number to a restaurant when you leave a reservation.” 2417

SAN DIEGO (KGTV) -- Three San Diego Dreamers are flying to Washington D.C. to meet with congressional members, attend rallies and continue to advocate for our border communities. “March 5 is a very significant date for us," Dulce Garcia said. "The president gave congress six months to come up with a permanent fix for this DACA crisis, and it didn’t happen. So we want to make sure we’re in D.C. when March 5 comes.”“Absolutely, yes I’m nervous," Francisco Peralta said. "This is the first time actually being in D.C. ever and also it’s the first time that I’m going to be sitting in a room where, you know, with members of congress.”Ali Torabi will also be going. He started a GoFundMe to help raise money for their trip, as well as helped organize an art show. The three Dreamers will leave Saturday, March 3 and return Wednesday, March 7.   892

SAN DIEGO (KGTV) -- Two men are dead after a shooting near a Mountain View park Sunday afternoon. Two black men, ages 33 and 37, were shot in the upper body, San Diego Police said. Both men died at the hospital.The shooting happened around 1:20 p.m. Sunday near South 40th Street and Ocean View Boulevard. Police said the victims were standing near the Mountain View Community Center when they were shot.The suspect is described as a black man wearing dark clothing.South 40th Street was closed between Teak Street and Hemlock Street while police investigated the crime.The circumstances leading up to the shooting are not known.Anyone with information is asked to call the homicide unit at 619-531-2293 or Crime Stoppers at 888-580-8477. 776