Generate an explanation for the given claim using the provided supporting material from the paragraph. Please consider the following points while generating an output. 1) The claim will always have supporting proof in the paragraph, and the paragraph will have a clear point of view supporting the claim. 2) There can be instances where direct correlation to the claim is not available. Make use of the sentences in the paragraph to provide a corresponding output supporting the claim. 3) The explanation should be at least one and at most twelve sentences long.

Q: Paragraph: The new measures may include screening air travelers for fever when they arrive in the United States from the worst-stricken countries in West Africa, on direct or indirect flights, Schumer said in a statement. He said U.S. Centers for Disease Control and Prevention (CDC) Director Dr. Thomas Frieden told him the agency might adopt some of the recommendations Schumer had made on Ebola screening over the weekend. Those included having the CDC and Customs and Border Protection conduct intense health screening of workers at U.S. ports of entry. The New York Democrat also urged the Department of Homeland Security to create a database of people flying to and from West Africa, which would be shared with hospitals around the country. "The CDC has been doing a very good job thus far in combating the threat, but you can't be too careful when it comes to stopping a deadly epidemic," Schumer said in the statement. The outbreak has killed at least 3,439 people out of 7,492 confirmed, probable and suspected cases since it emerged in Guinea in March, in the worst Ebola epidemic on record. Along with Guinea, the worst-hit countries have been Sierra Leone and Ebola. The disease has also spread to Nigeria and Senegal, but is considered contained there. A man who traveled to Dallas from Liberia last week became the first patient diagnosed with the disease on U.S. soil. In Spain, officials reported on Monday that a nurse had become the first person infected with the hemorrhagic virus in Europe. White House spokesman Josh Earnest said the administration had confidence in the system as it exists but was working on additional safety protocols that would be announced in the coming days. "The president's team is hard at work on developing additional protocols for additional screening measures," Earnest told reporters on Air Force One. Claim: U.S. to require tougher Ebola screening at airports: senator.

A: U.S. health officials are preparing to require tougher Ebola screening at American airports this week to keep the deadly virus from spreading to this country, Senator Chuck Schumer said on Tuesday.
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Q: Paragraph: Malls, restaurants and streets in Daegu, the country's fourth largest city with a population of 2.5 million, were largely empty in scenes that residents and social media users likened to a disaster movie. "It's like someone dropped a bomb in the middle of the city. It looks like a zombie apocalypse," Kim Geun-woo, a 28-year-old resident told Reuters by telephone. "Even Dongseong-ro Street the most crowded centre of the city is empty," he said, adding that he had tried to buy surgical masks but shops were sold out. Korea's Centres for Disease Control and Prevention (KCDC) reported 53 new cases of the virus on Thursday, following 20 a day earlier, taking the total across the country to 104. Of that national tally, 70 patients are from Daegu or nearby and the majority have been traced to an infected 61-year-old woman known as "Patient 31" who attended a church, a scenario that KCDC described as a "super-spreading event". South Korea also reported the first death of a coronavirus patient, though the man's exact cause of death was being investigated. The man was among 13 people at a hospital near Daegu who tested positive for the virus. Health officials said they were investigating whether there were links between the outbreak at the church and the hospital. The hospital would be temporarily shut down and about 600 staff and patients would be tested for the virus, Yonhap news agency reported, citing officials. Several major department stores, including at least one in Seoul, were closed after reports that Patient 31 had visited in recent weeks, Yonhap reported. Daegu Mayor Kwon Young-jin told residents to stay indoors as he warned of likely further cases. "We are in an unprecedented crisis," he said at a briefing in the city, about 240 km (150 miles) southwest of the capital Seoul. Kwon cautioned that at least 90 more of the about 1,000 other people who attended services at the Temple of the Tabernacle of the Testimony were also showing symptoms. "We plan to test all believers of that church and have asked them to stay at home isolated from their families," Kwon said. South Korea's vice health minister Kim Kang-lip said at a separate briefing in the administrative city of Sejong that the situation was "very grave". The cases previously reported in South Korea had mostly involved people who had travelled individually to China or come into contact with somebody who had, but it is unclear how Patient 31 contracted the virus. Daegu authorities ordered the shutdown of all kindergartens, while all schools will postpone the beginning of the spring semester scheduled for early March by one week in an unprecedented move, Yonhap said. The Defence Ministry banned troops stationed in Daegu from leaving their barracks and receiving guests, while a soldier who had recently visited his home in Daegu tested positive for the virus. The U.S. military imposed similar restrictions on its army base in the city, which houses thousands of troops, family members and civilian employees, curbing travel and closing schools and child-care centres. Media footage showed the few people on Daegu's usually bustling downtown streets wore face masks and kept far apart. Topics such as "Daegu lockdown" and "Daegu church" were among the top searches on major South Korean portal Naver as debate heated up online about whether the city should be sealed off from the rest of the country. A KCDC official told Reuters the government was not considering that measure. The church at the centre of the outbreak is a branch of the Shincheonji Church of Jesus, a religious movement founded in 1984 by South Korean Lee Man-hee who has about 500,000 followers. Some commentators on social media blamed the custom of churchgoers sitting on the floor close to each other during services as increasing the risk of spreading the virus. Shincheonji said on Wednesday it had closed its Daegu church and instructed that services elsewhere be held online or individually at home. Claim: 'Like a zombie apocalypse': Residents on edge as coronavirus cases surge in South Korea.

A: Residents of a South Korean city at the centre of a new coronavirus outbreak described empty streets, deserted shops, and a climate of fear as a surge in confirmed cases linked to a church raised the prospect of wider transmission.
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Q: Paragraph: Andee Shuster and Ben Urovitch kiss as in front of a heart shaped sculpture outside the Montreal Museum of Arts, February 13, 2005. U.S. researchers said their observational study was the first to show an independent relationship between positive emotions and coronary heart disease, but stressed that more work was needed before any treatment recommendations could be made. "We desperately need rigorous clinical trials in this area. If the trials support our findings, then these results will be incredibly important in describing specifically what clinicians and/or patients could do to improve health," Karina Davidson of Columbia University Medical Center wrote in the study in the European Heart Journal. Heart disease is the leading killer of men and women in Europe, the United States and most industrialized countries. Together with diabetes, cardiovascular diseases accounted for 32 percent of all deaths around the world in 2005, according to the World Health Organization. Over 10 years, Davidson and her team followed 1,739 men and women who were taking part in a large health survey in Canada. Trained nurses assessed the participants' heart disease risk and measured negative emotions like depression, hostility and anxiety, as well as positive emotions like joy, happiness, excitement, enthusiasm and contentment collectively known as a "positive affect". The researchers ranked the "positive affect" across five levels ranging from "none" to "extreme" and found that for each rank the risk of heart disease fell by 22 percent. Davidson, who led the research, said her findings suggested it might be possible to help prevent heart disease by enhancing people's positive emotions. "Participants with no positive affect were at a 22 percent higher risk of ... heart attack or angina ... than those with a little positive affect, who were themselves at 22 percent higher risk than those with moderate positive affect," she wrote. "We also found that if someone who was usually positive had some depressive symptoms at the time of the survey, this did not affect their overall lower risk of heart disease." Smoking, being overweight, a history of heart problems in the family and high blood pressure are traditionally seen as major risk factors for heart disease, but studies have also linked such things as intelligence and income levels to heart risks. Research published last week found intelligence is second only to smoking as a predictor of heart disease. Ellen Mason of the British Heart Foundation (BHF) advocacy group said Thursday's study echoed previous findings which had prompted the BHF to delve deeper. "The BHF is funding science to unravel the biology that underlies this link," she said. Davidson's team said one possible reason for the link between happiness and heart risk could be that people who are happier tend to have longer periods of rest or relaxation, and may recover more quickly from stressful events and not spend as much time "re-living" them. Claim: Happiness makes for a healthy heart.

A:
People who are usually happy and enthusiastic are less likely to develop heart disease than those who tend to be glum, scientists said on Thursday, and boosting positive emotions could help cut heart health risks.
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