(CNN) -- The deadliest Ebola outbreak in history continues to plague West Africa as leaders scramble to stop the virus from spreading.
Over the weekend, Liberian President Ellen Johnson Sirleaf closed most of the country's borders. The few points of entry that are still open will have Ebola testing centers and will implement preventive measures, she said. The president also placed restrictions on public gatherings and ordered hotels, restaurants and other entertainment venues to play a 5-minute video on Ebola safety."No doubt the Ebola virus is a national health problem," Sirleaf said in a statement. "It attacks our way of life, with serious economic and social consequences. As such we are compelled to bring the totality of our national resolve to fight this scourge."if (typeof cnnArticleGallery == "undefined") {var cnnArticleGallery = {};}if(typeof cnnArticleGallery.currentImageList =="undefined"){cnnArticleGallery.currentImageList = [];}var expGallery41=new ArticleExpandableGallery();expGallery41.setImageCount(14);//cnn_adbptrackpgalimg("Ebola outbreak in West Africa", 1);
A 10-year-old boy whose mother was killed by the Ebola virus walks with a doctor from the aid organization Samaritan's Purse after being taken out of quarantine Thursday, July 24, in Monrovia, Liberia. Health officials say an Ebola outbreak centered in West Africa is the deadliest ever. As of July 20, some 1,093 people in Guinea, Sierra Leone and Liberia are thought to have been infected by Ebola since its symptoms were first observed four months ago, according to the World Health Organization.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":true,"x":4,"y":1,"pos":1,"title":"Ebola outbreak in West Africa"}
A health worker with disinfectant spray walks down a street outside the government hospital in Kenema, Sierra Leone, on Thursday, July 10. cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":2,"title":"Ebola outbreak in West Africa"}
In this photo provided by Samaritan's Purse, Dr. Kent Brantly, left, treats an Ebola patient in Monrovia. On Saturday, July 26, the North Carolina-based group said Brantly tested positive for the disease and was being treated at a hospital in Monrovia.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":3,"title":"Ebola outbreak in West Africa"}
A member of Doctors Without Borders puts on protective gear at the isolation ward of the Donka Hospital in Conakry, Guinea, on Saturday, June 28.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":4,"title":"Ebola outbreak in West Africa"}
Airport employees check passengers in Conakry before they leave the country on Thursday, April 10.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":5,"title":"Ebola outbreak in West Africa"}
CNN's Dr. Sanjay Gupta, left, works in the World Health Organization's mobile lab in Conakry. Gupta traveled to Guinea in April to report on the deadly virus.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":6,"title":"Ebola outbreak in West Africa"}
A Guinea-Bissau customs official watches arrivals from Conakry on Tuesday, April 8.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":7,"title":"Ebola outbreak in West Africa"}
Egidia Almeida, a nurse in Guinea-Bissau, scans a Guinean citizen coming from Conakry on April 8. cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":8,"title":"Ebola outbreak in West Africa"}
A scientist separates blood cells from plasma cells to isolate any Ebola RNA and test for the virus Thursday, April 3, at the European Mobile Laboratory in Gueckedou, Guinea.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":9,"title":"Ebola outbreak in West Africa"}
Members of Doctors Without Borders carry a dead body in Gueckedou on Friday, April 1. cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":10,"title":"Ebola outbreak in West Africa"}
Gloves and boots used by medical personnel dry in the sun April 1 outside a center for Ebola victims in Gueckedou.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":11,"title":"Ebola outbreak in West Africa"}
A health specialist works Monday, March 31, in a tent laboratory set up at a Doctors Without Borders facility in southern Guinea.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":12,"title":"Ebola outbreak in West Africa"}
Health specialists work March 31 at an isolation ward for patients at the facility in southern Guinea.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":13,"title":"Ebola outbreak in West Africa"}
Workers associated with Doctors Without Borders prepare isolation and treatment areas Friday, March 28, in Guinea. cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length] = {"currentPicture":false,"x":4,"y":1,"pos":14,"title":"Ebola outbreak in West Africa"}
Photos: Ebola outbreak in West Africa As of July 20, the World Health Organization had confirmed 224 cases of Ebola in Liberia, including 127 deaths. Overall, Ebola has killed at least 660 people in West Africa. There were 45 new cases reported in the region between July 18 and July 20 alone.Ebola: Fast FactsHealth officials are worried about the virus spreading to other countries in the region. On Friday, a Liberian man with Ebola died in Lagos, Nigeria, Nigerian Health Minister Onyebuchi Chukwu said.The man arrived at Lagos' airport on July 20 and was isolated at a local hospital after exhibiting common Ebola symptoms. He told officials he had no direct contact with anyone who had the virus.On Monday, Arik Air, one of Nigeria's biggest airlines, suspended operations into the country's capital, Monrovia, and another city called Freetown, according to AllAfrica.com.Meanwhile, American health care workers helping to fight this deadly disease abroad have put themselves at risk.Dr. Kent Brantly, a 33-year-old Indianapolis resident, had been treating Ebola patients in Monrovia when he started to feel sick.Brantly works with Samaritan's Purse, a Christian international relief agency founded by evangelists Franklin Graham and Robert Pierce. He has been the medical director for the Ebola Consolidated Case Management Center in Monrovia and has been working to help Ebola patients since October.Deadliest ever outbreak: what you need to knowvar currExpandable="expand113";if(typeof CNN.expandableMap==='object'){CNN.expandableMap.push(currExpandable);}var mObj={};mObj.type='video';mObj.contentId='';mObj.network='cnn';mObj.source='world/2014/07/27/pkg-holmes-ebola-outbreak.cnn';mObj.videoSource='CNN';mObj.videoSourceUrl='http://www.cnn.com';mObj.lgImage="http://i2.cdn.turner.com/cnn/dam/assets/140727082308-pkg-holmes-ebola-outbreak-00002605-story-body.jpg";mObj.lgImageX=300;mObj.lgImageY=169;mObj.origImageX="214";mObj.origImageY="120";mObj.contentType='video';CNN.expElements.expand113Store=mObj;var currExpandable="expand213";if(typeof CNN.expandableMap==='object'){CNN.expandableMap.push(currExpandable);}var mObj={};mObj.type='video';mObj.contentId='';mObj.network='cnn';mObj.source='world/2014/07/08/pkg-rivers-guinea-ebola-education.itn';mObj.videoSource='ITN';mObj.videoSourceUrl='http://www.itn.co.uk/Home/TopStories';mObj.lgImage="http://i2.cdn.turner.com/cnn/dam/assets/140708153853-pkg-rivers-guinea-ebola-education-00004221-story-body.jpg";mObj.lgImageX=300;mObj.lgImageY=169;mObj.origImageX="214";mObj.origImageY="120";mObj.contentType='video';CNN.expElements.expand213Store=mObj;var currExpandable="expand313";if(typeof CNN.expandableMap==='object'){CNN.expandableMap.push(currExpandable);}var mObj={};mObj.type='video';mObj.contentId='';mObj.network='cnn';mObj.source='health/2014/07/08/dnt-rivers-uk-itn-inside-deadly-ebola-clinic-guinea.itn';mObj.videoSource='ITN';mObj.videoSourceUrl='http://www.itn.co.uk/Home/TopStories';mObj.lgImage="http://i2.cdn.turner.com/cnn/dam/assets/140708083831-dnt-rivers-uk-itn-inside-deadly-ebola-clinic-guinea-00002221-story-body.jpg";mObj.lgImageX=300;mObj.lgImageY=169;mObj.origImageX="214";mObj.origImageY="120";mObj.contentType='video';CNN.expElements.expand313Store=mObj;var currExpandable="expand413";if(typeof CNN.expandableMap==='object'){CNN.expandableMap.push(currExpandable);}var mObj={};mObj.type='video';mObj.contentId='';mObj.network='cnn';mObj.source='world/2014/06/25/lead-vo-gupta-ebola-outbreak.cnn';mObj.videoSource='CNN';mObj.videoSourceUrl='http://thelead.blogs.cnn.com/';mObj.lgImage="http://i2.cdn.turner.com/cnn/dam/assets/140416084415-gupta-ebola-story-body.jpg";mObj.lgImageX=300;mObj.lgImageY=169;mObj.origImageX="214";mObj.origImageY="120";mObj.contentType='video';CNN.expElements.expand413Store=mObj;"When the Ebola outbreak hit, he took on responsibilities with our Ebola direct clinical treatment response, but he was serving in a missionary hospital in Liberia prior to his work with Ebola patients," said Melissa Strickland, a spokeswoman for the organization.After testing positive for Ebola, he went into treatment at a Samaritan's Purse isolation center at ELWA Hospital in Paynesville City, Monrovia.Another American working with Samaritan's Purse has also been infected. Nancy Writebol from Charlotte, North Carolina, works with Serving in Mission, or SIM. She and her husband used to work with orphans and other children who struggle with poverty-related issues but expanded their efforts to take on the complex medical problems in Monrovia.She had teamed up with the staff from Samaritan's Purse to help fight the Ebola outbreak in Monrovia when she got sick. She too is undergoing treatment.Other health care workers are getting sick.Another doctor who has played a key role in fighting the outbreak in Sierra Leone, Dr. Sheik Humarr Kahn, is sick. He is being treated by the French aid group Medecins Sans Frontieres --also known as Doctors Without Borders -- in Kailahun, Sierra Leone, according to a representative of that agency.Kahn had been overseeing treatment of Ebola patients in isolation units at Kenema Government Hospital, which is about 185 miles (298 kilometers) east of the capital, Freetown.In a statement, Sierra Leone's minister of health and sanitation called the doctor a national hero for the sacrifices he has made in trying to stop the outbreak.Doctors and medical staff are particularly vulnerable to the virus since it spreads through exposure to bodily fluids from the infected. It can also spread through contact with an object contaminated by an infected person's bodily fluids.The disease is not contagious until symptoms appear. Symptoms of Ebola include fever, fatigue and headaches. They can appear two to 21 days after infection, meaning many who are sick don't even know it.The early symptoms then can progress to vomiting, diarrhea, impaired kidney and liver function, and sometimes internal and external bleeding.Leaders in the international health community characterize the Ebola epidemic as the "deadliest ever."While the World Health Organization has mobilized to fight the epidemic, it can be a difficult one to stop. It is so highly infectious that it typically kills 90% of those who catch it. The death rate in this particular outbreak had dropped to roughly 60% since it has been treated early in many cases. There is, however, no Ebola vaccination.Is it time to test experimental vaccines?With the announcement that Liberia is closing its borders, the country also instituted a new travel policy to inspect and test all outgoing and incoming passengers. The hope is that such measures will stop the spread of the virus.There has never been a confirmed case of Ebola spreading to a developed country, said Kamiliny Kalahne, an epidemiologist with Doctors Without Borders."This is because people generally transmit the infection when they are very sick, have a high fever and a lot of symptoms -- and in these situations, they don't travel."And even if they do get sick once they travel to a developed country, they will be in a good hospital with good infection control, so they are very unlikely to infect others," she said."This is not the great plague," CNN's Dr. Sanjay Gupta said after his trip to the region in the spring. "But it is a pretty formidable killer.""The grim reality is it often kills so quickly, people don't have time to spread it."Watch: Dr. Gupta dispels Ebola myths/* push in config for this share instance */cnn_shareconfig.push({"id" : "cnn_sharebar2","url" : "http://www.cnn.com/2014/07/28/health/ebola-outbreak-west-africa/index.html","title" : "Liberia closes its borders to stop Ebola"});cnnad_newTileIDGroup(['607x95_adlinks','336x280_adlinks']);
Sarasota County Sheriff's Office officials look over a plane that hit a father and daughter Sunday on a Florida beach.Irizarry died on the scene. His daughter was airlifted to All Children's Hospital and is believed to be in critical condition, according to the sheriff's office."The dad looked very bad," witness Zack Arceneaux told CNN affiliate Bay News 9. "They were performing CPR on him. He had blood on his face. It looked like he wasn't breathing at all.""It's the last thing you'd expect," Arceneaux said to CNN affiliate WTSP. "I didn't hear anything. Actually I thought the motor must've went out. I didn't hear anything. Figured, maybe it ran out of fuel and just hit them and they weren't ready."The pilot, Karl Kokomoor and his passenger, David Theen, were uninjured. Both are from Englewood, Florida.The National Transportation Safety Board and the FAA are investigating.Pilot jumps from his own damaged planeCNN's Joe Sutton contributed to this report /* push in config for this share instance */cnn_shareconfig.push({"id" : "cnn_sharebar2","url" : "http://www.cnn.com/2014/07/27/us/florida-plane-crash-lands-on-beach/index.html","title" : "Emergency landing on Florida beach kills beachgoer, injures daughter"});cnnad_newTileIDGroup(['607x95_adlinks','336x280_adlinks']);
A 3-year-old crashed a Jeep into a home in Myrtle Creek, Oregon July 22, 2014.3-year-old was at home in Oregon under his mother's watchHe found the keys, got inside the car and knocked it out of gear, police say The Jeep rolled and hit a neighbor's homePolice: Toddler then went home and watched "cartoons like nothing ever happened"
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a Jacques Brel tune with lyrics by Rod McKuen. It spent three weeks at No. 1 in March." border="0" height="360" id="articleGalleryPhoto001" style="margin:0 auto;" width="640"/>There was something draining about 1974. Richard Nixon resigned the presidency; the final pullout from Vietnam was in sight. The pop charts often reflected this fatigue with some of the most criticized music of the rock era -- not least Terry Jacks' "Seasons in the Sun," a Jacques Brel tune with lyrics by Rod McKuen. It spent three weeks at No. 1 in March.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":true,"x":0,"y":0,"pos":1,"title":"1974: A year of pop culture chaos"}
about a woman begging her lover not to volunteer for the military, hit No. 1 in June." border="0" height="360" id="articleGalleryPhoto002" style="margin:0 auto;display:none" width="640"/>Bo Donaldson and the Heywoods' "Billy, Don't Be a Hero," about a woman begging her lover not to volunteer for the military, hit No. 1 in June.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":2,"title":"1974: A year of pop culture chaos"}
"The Night Chicago Died," set on "the East Side of Chicago" (which most people would think of as Lake Michigan,
a romantic song that sent camels to bed and maintained that cactus "is our friend." " border="0" height="360" id="articleGalleryPhoto004" style="margin:0 auto;display:none" width="640"/>Maria Muldaur hit the Top 10 with "Midnight at the Oasis," a romantic song that sent camels to bed and maintained that cactus "is our friend." cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":4,"title":"1974: A year of pop culture chaos"}
2006 CNN.com survey of the worst songs of all time. What a lovely way to say how much you love me, indeed." border="0" height="360" id="articleGalleryPhoto005" style="margin:0 auto;display:none" width="640"/>Paul Anka hit No. 1 in late August with "(You're) Having My Baby," a song that won a 2006 CNN.com survey of the worst songs of all time. What a lovely way to say how much you love me, indeed.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":5,"title":"1974: A year of pop culture chaos"}
But 1974's music wasn't all bad -- far from it. Stevie Wonder was at his peak. In 1974 he put out the Grammy-winning "Fulfillingness' First Finale" album and hit No. 1 with "You Haven't Done Nothin'." cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":6,"title":"1974: A year of pop culture chaos"}
Singer-songwriter Joni Mitchell hit the Top 10 with her single "Help Me" from her album "Court and Spark," which remains Mitchell's best-selling work.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":7,"title":"1974: A year of pop culture chaos"}
Elton John mania, which dominated the 1970s, continued in 1974, helped by his late 1973 album "Goodbye Yellow Brick Road." That No. 1 album produced a 1974 No. 1 single, "Bennie and the Jets." John also released the No. 1 album "Caribou" in 1974.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":8,"title":"1974: A year of pop culture chaos"}
The Three Degrees were one of many acts on the influential Philadelphia International Records who had hits in 1974, including "TSOP" (in which they backed up MFSB) and "When Will I See You Again."cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":9,"title":"1974: A year of pop culture chaos"}
The Ramones played their first show in 1974, helping pave the way for the punk/New Wave movement that produced Blondie, Talking Heads and Patti Smith. In August, not far into their career, they played CBGB for the first time and soon became regulars.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":10,"title":"1974: A year of pop culture chaos"}
1974 is considered a great year for movies. "The Godfather Part II," starring Al Pacino, was a huge success at the box office -- and won best picture at the Academy Awards. cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":11,"title":"1974: A year of pop culture chaos"}
Mel Brooks directed two of the year's most popular films: "Blazing Saddles," with Gene Wilder, left, and Cleavon Little; and "Young Frankenstein."cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":12,"title":"1974: A year of pop culture chaos"}
"Chinatown," directed by Roman Polanski and starring Jack Nicholson, left, and Faye Dunaway, was a well-received detective story about corruption in 1940s Los Angeles.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":13,"title":"1974: A year of pop culture chaos"}
Albert Finney played Hercule Poirot, Agatha Christie's famed detective, in an all-star version of "Murder on the Orient Express." The film was directed by Sidney Lumet.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":14,"title":"1974: A year of pop culture chaos"}
"The Towering Inferno," starring Paul Newman, left, and Steve McQueen, was the biggest of the year's disaster films. Others included "Earthquake" and "Airport 1975."cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":15,"title":"1974: A year of pop culture chaos"}
"Benji," about a goodhearted stray dog who saves the lives of two children, was a sleeper hit. It was among the top 10 box-office successes of 1974 and spawned a number of sequels.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":16,"title":"1974: A year of pop culture chaos"}
Another surprise hit was "The Life and Times of Grizzly Adams," starring Dan Haggerty as a frontiersman who becomes pals with a bear. The film was later turned into an NBC TV series.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":17,"title":"1974: A year of pop culture chaos"}
helped pioneer the idea of the wide release." border="0" height="360" id="articleGalleryPhoto0018" style="margin:0 auto;display:none" width="640"/>"The Trial Of Billy Jack," starring Tom Laughlin, was the sequel to the surprise 1971 smash "Billy Jack." It was even more successful at the box office than the first film and helped pioneer the idea of the wide release.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":18,"title":"1974: A year of pop culture chaos"}
"The Texas Chain Saw Massacre" was an early example of the slasher film -- considered so violent at the time that it was dropped from many theaters. Marilyn Burns, Ed Guinn and Gunnar Hansen starred in the work, directed by Tobe Hooper.cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":19,"title":"1974: A year of pop culture chaos"}
MGM mined its vaults for musical clips -- including this one of Fred Astaire in "Royal Wedding" -- for "That's Entertainment," touted with the tagline, "Boy, do we need it now." cnnArticleGallery.currentImageList[cnnArticleGallery.currentImageList.length]={"currentPicture":false,"x":0,"y":0,"pos":20,"title":"1974: A year of pop culture chaos"}HIDE CAPTION1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos1974: A year of pop culture chaos<<<
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20>>>Event.observe(window,'load',function(){if(typeof(cnn_adbptrackpgalimg) == 'function' && typeof(cnnArticleGallery) != 'undefined'){cnn_adbptrackpgalimg(cnnArticleGallery.currentImageList[0].image,"Forty years ago, chaos reigned in pop culture");}});STORY HIGHLIGHTS1974 featured some much-maligned pop songs but great moviesYear was fatiguing, with Nixon, Vietnam finally leaving stagePop was in statis at the time, getting segmented; movies reveled in chaosSome patterns still borne out today