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During the last few months, many health experts have been talking about reaching “herd immunity” with the distribution of the COVID-19 vaccine. Over the Christmas weekend, Dr. Anthony Fauci said he estimates the country needs to reach 80-85% with the vaccine to attain herd immunity.Here’s what that means.Herd immunity is a concept used in discussions about vaccination, and signifies the threshold needed for a population as a whole to be protected from a virus.The World Health Organization clarifies that herd immunity, or population immunity, “is achieved by protecting people from a virus, not by exposing them to it.”The Mayo Clinic also describes the situation following the 1918 Spanish Flu outbreak. They say people who survived the pandemic were later immune to infection of the H1N1 flu, also referred to as swine flu.Health experts warn that relying on community infection to create herd immunity could be dangerous; there are questions about how long the antibodies created by infection protect against reinfection, and a high level of community infection could lead to overwhelmed medical facilities and a high number of deaths.When the threshold of herd immunity is reached, it means the vast majority of a population is vaccinated and has antibodies, thereby lowering the overall amount of community spread of the virus. It also means portions of the population who cannot get vaccinated are kept safer by the limited spread.What that threshold is varies depending on the virus and the efficacy of the vaccine.According to the WHO, herd immunity against the measles is reached with 95% vaccination, while herd immunity against polio is 80%.Dr. Fauci believes herd immunity for COVID-19 can be reached with around 85% of the population having antibodies. 1778

Dozens of people are gathering outside of the TCF Center in Downtown Detroit, trying to get inside to challenge votes which are being counted.People outside of the center say they are not being let in to challenge the votes. The Detroit Health Department said TCF Center is at capacity and that's what police are enforcing.Republicans are hoping to challenge the vote and claimed they were unfairly being kept outside where the absentee ballots are being counted. Hundreds of challengers are already inside TCF Center.Video from our photographer inside the center showed one poll challenger being escorted out of the TCF Center to cheers. 646

EL CAJON, Calif. (KGTV) - A man fatally stabbed inside an East County condominium has been identified as an active-duty service member.Anderson Lopes, 24, was found unresponsive at his El Cajon condo just after 10:30 p.m. on March 6, according to the San Diego Sheriff's Department. Lopes's wife said her husband was injured in an assault inside the home in the 13000 block of Pinkard Way.Lopes was treated at the scene and brought to a nearby hospital, but died from his injuries. His wife, who said she was trying to break up the fight, was stabbed in the thigh and underwent surgery.RELATED: Suspect arrested in El Cajon stabbing deathSDSO said Lopes was an active-duty service member in the U.S. Navy.Deputies detained Dylan Poston, 26, at the scene. Poston has been charged with one count of murder and is being held without bail at San Diego County Jail.It's not clear what led to the reported altercation.The murder is still under investigation. Anyone with information is asked to call SDSO at 858-974-2321 or 858-565-5200, or Crime Stoppers at 888-580-8477. 1099

EL CAJON, Calif. (KGTV)— Family and friends of 19-year-old Kiera Bergman gathered at the Ronald Reagan Community Center to celebrate her life. A month-long search ended in a body discovery in the Arizona desert. Her ex-boyfriend, 23-year-old John Clark is accused of killing her. Kiera Bergman was the eldest daughter of the Bergman-Bragg family. Her mother Kiersten Bragg remembered Kiera had a strong personality, even before she was born.“I never forget I would always crave SpaghettiOs and that was one of her favorite things to eat,” Bragg said. She said as a teen Kiera would crave the canned spaghetti. Her family told 10News, Kiera was a spunky, playful, chunky toddler. "I always compared her to the Michelin man because she had tons of rolls everywhere,” her mother laughed. Then she became a big sister to Braydee. Kiera was silly, artistic, a talented singer, with a big heart. In his speech at the ceremony, her grandfather shared the time she spent her first ever paycheck from her part-time job on the homeless.“She bought the lady lunch. And I don't know many teenagers who will take their first paycheck and do that. So that kind of shows you what kind of girl she was,” Jim Bergman said, in tears. They said Kiera hoped to one day combine her giving personality with her dream job - America's best hairstylist.“Her dream was to at least once or twice a month, go to the homeless and do their hair and make them feel better about themselves,” Bragg said. But she was not able to live out her dream. Her boyfriend at the time, John Clark, convinced her to drop out of Cosmetology school. The two them moved to Arizona in March. Her boyfriend is accused of killing and leaving Bergman in the Arizona desert."That's what breaks my heart. She still had so much love to give,” Bragg said. Kiera Bergman's celebration of Life ceremony was so packed, it was standing-room only. 1945

EDINBURG, Texas - A bizarre incident during a high school playoff game in Texas on Thursday left a referee with injuries after being attacked by a player he had just ejected.Edinburg High School defensive end Emmanuel Duron was penalized for shoving another player to the ground and attempting to tackle the opposing team's quarterback after a play was over The Monitor reports.Referee Fred Garcia ejected Duron from the game for the two unsportsmanlike penalties.After Garcia announced the ejection, Duron charged back onto the field and slammed into the referee, causing him to fly back into the artificial turf.Duron's teammates and coaches held the player back while crews attended to Garcia. Four off-duty police officers escorted Duron out of the stadium and away from the premises.Garcia was able to walk off the field on his own and was evaluated in an ambulance outside the stadium. He was reported to have suffered a concussion and a shoulder injury.After the delay, the game resumed and Edinburg ended up defeating Pharr-San Juan-Alamo 35-21 to advance to the playoffs, The Associated Press reported. But on Friday, the team was removed from the playoffs by the school district, the district announced in a statement."The district has decided to remove the Edinburg High School football team from the playoffs after an unexpected incident involving a student that occurred during a football game on December 3, 2020," the district said. "We extend a sincere apology to the referee and his family. On behalf of the Edinburg CISD Board of Trustees and administration, we apologize to the athletes, staff, and our school community. We will take the appropriate disciplinary action once we understand the facts and circumstances underlining this incident. The district takes these matters very seriously; however, we cannot comment further on a pending investigation."Duron was charged Friday with assault and is being held in jail on a ,000 bond.The Monitor reports Duron was suspended from the school's soccer team for a similar incident last season.This story was first reported by Jeff Tavss at KSTU in Salt Lake City, Utah. 2146

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