成都 静脉曲张 中医(成都静脉曲张的治疗手术多少钱) (今日更新中)

Each winter, many people wonder whether its worth getting a flu shot while health officials repeatedly warn against not getting one.Now a new study sheds light on the benefit of doing so. Even when the flu shot is just 20% effective it can still reduce US doctor visits due to illness by an estimated 20 million in a single year, the new report published in the scientific journal PNAS (Proceedings of the National Academy of Sciences of the United States) finds.In addition, vaccination also can prevent thousands of hospitalizations and deaths, the study authors estimated based on the average vaccination coverage rate in the United States."Getting vaccinated against influenza is beneficial to the individual and to the community even when the vaccine is of relatively low efficacy," said Burton H. Singer, co-author of the study and an adjunct professor for the Emerging Pathogens Institute at University of Florida in Gainesville.Caused by viruses, flu is a contagious respiratory illness with mild to severe symptoms that can sometimes lead to death. The flu virus evolves rapidly and new viruses circulate in different parts of the world, so each year scientists must reformulate the vaccine. Add to that an imperfect manufacturing process and even a 'good match' formulation may not be as effective as scientists would like.In fact, the Centers for Disease Control and Prevention estimated just 36% effectiveness for the 2017-18 seasonal vaccine as of February 3. (The season ends in May.)For the new study, Singer and his colleagues created a mathematical model of flu transmission and vaccination to evaluate how much illness is prevented by even a very low effectiveness flu vaccine. The research team found that at the average rate of US coverage even a poor vaccine would prevent a significant amount of illnesses, hospitalizations and deaths.For example, at just 43% coverage (the average rate of Americans who received a flu shot for the years 2012 through 2017), a vaccine with just 20% effectiveness could avert more than 20 million infections or illnesses as compared to not getting the vaccine. In addition, 129,000 hospitalizations and 61,000 deaths could be prevented.Based on the model, if more people got a flu shot, say half of the US population, the same 20% effective flu shot would prevent an additional 3.63 million infections, 21,987 hospitalizations and 8,479 deaths."When a vaccine is fully effective on 50% or more of the people who are vaccinated, you need to primarily focus on vaccinating young children," said Singer. The reason? Children are still building immunity and they pass germs around at school."As efficacy of the vaccine decreases, it becomes increasingly important for the elderly to be vaccinated in addition to young children," said Singer, since the elderly are more likely to develop complications from the flu, such as pneumonia, which can be deadly.The CDC reported a total of 160 flu-related deaths in children and 30,064 flu-related hospitalizations overall?between October 1, 2017 and April 21, 2018. The highest rate of hospitalization occurred among adults 65 years old and older.Richard Webby, a flu scientist who is part of the World Health Organization's advisory board and a member of St. Jude Children's Research Hospital's Department of Infectious Diseases, said "effectiveness estimates go up and down based on a number of factors including match of vaccine and circulating strain and probably other factors we don't fully understand.""The take home message from the past few seasons is that there is much room for improvement," said Webby, who was not involved in the research.Still, more people, particularly the elderly, need to get vaccinated even when the vaccine effectiveness is lower than hoped, Webby said: "This study suggests that even with a less than optimal vaccine there is still much public health benefit that can be achieved if these are used properly and widely." 3992

DOVER, Del. (AP) — Erik Moses has been named president of Nashville Superspeedway. He's the first Black man to hold that title at any NASCAR track. Moses most recently served as president of the XFL's DC Defenders. Prior to working for the XFL, Moses served as CEO of the DC Sports & Entertainment Commission, Director of D.C. Department of Small & Local Business Development, and Senior Vice President at Events DC.He now leads the charge of the scheduled Nashville reboot in 2021. Moses says he was "hired to do a job, not because of what color I am." 570

Disinformation is a problem the country has been dealing with since the past election, but trolls are now getting more specific and targeting communities of color, specifically Black communities.“Bad actors use real cultural issues and conversations happening in Black communities and other communities of African descent and start injecting disinformation and false ideals,” said Jessica Ann Mitchell Aiwuyor, founder of the National Black Cultural Information Trust.A lot of the issues brought up by “bad actors” include talks of reparations and other conversations about slavery.These are real issues that need attention, but trolls will include false information. This ends up causing friction within Black communities and dissuades people from voting.The National Black Cultural Information Trust has made it a goal to counteract this type of disinformation.“So, what we are doing is putting out public service announcements, we are holding teach-ins, we are hosting webinars, we're doing interviews with scholars and activists so they can answer these questions directly,” said Aiwuyor.The group will also use tools to show if accounts have troll-like behavior.It also plans on building coalitions with Black immigrants and Latinos. 1246

Due to a coin shortage at the Federal Reserve, Kroger will no longer return coin change to customers. Instead, the remainders from cash transactions can either be donated to charity or applied to the customers' loyalty cards to be used on the next purchase.The change in giving change also applies to subsidiaries of Kroger, including Ralphs, Food 4 Less, King Soopers, Smith's and more. Kroger officials said, "at Kroger, we are implementing several creative solutions to minimize the impact to our customers. We know this is an inconvenience for our customers and we appreciate their patience. The Treasury Department expects the shortage to diminish as more regions of the country reopen."Customers have the following options if coins are not available:Round up to support Zero Hunger, Zero Waste FoundationPay with a form of payment other than cashHave their coin change loaded as credit toward their next purchase directly to their loyalty cardCustomers using self-checkout will still be able to receive coins.There are multiple reasons leading to the current coin shortage. The U.S. Mint has slowed production to keep employees safe from the coronavirus. With stay-at-home orders and business shut-downs, fewer people are spending coins at stores, laundromats, vending machines and other places. Walmart and CVS locations have also made changes to encourage customers to use exact change or plastic to pay for their items when possible. The Federal Reserve rationed coins in June and gathered a task force to look into the shortage to come up with possible solutions. This story was originally published by Rebekah Pewitt at WTVF. 1644

EL CAJON, Calif. (KGTV) -- An elderly man was struck by a car and killed as he crossed an El Cajon street Wednesday night.At around 11:30 p.m., El Cajon police and paramedics were called to the intersection of Jamacha and Main Street in response to a pedestrian hit by a vehicle.Police said a pickup truck was traveling northbound on Jamacha when it hit the 80 year-old-man. Officers say the victim's leg was amputated, and he was not breathing when they arrived at the scene.The victim, who was not identified, was taken to the hospital where he died from his injuries.According to police, the driver remained at the scene and was cooperating with investigators.Alcohol or drugs did not appear to be factors in the incident, police said. 746

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