Teacher:In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Teacher: Now, understand the problem? Solve this instance: These crawls are part of an effort to archive pages as they are created and archive the pages that they refer to. That way, as the pages that are referenced are changed or taken from the web, a link to the version that was live when the page was written will be preserved.Then the Internet Archive hopes that references to these archived pages will be put in place of a link that would be otherwise be broken, or a companion link to allow people to see what was originally intended by a page's authors.The goal is to fix all broken links on the web . Crawls of supported "No More 404" sites. ||||| Story highlights An 18-year-old experienced difficulty breathing and chest pains after using an e-cigarette 
  
 Her doctors diagnosed hypersensitivity pneumonitis, or "wet lung" 
  
 (CNN) An 18-year-old woman working as a hostess in a rural Pennsylvania restaurant decided to try e-cigarettes, perhaps another of the innumerable bistro workers hoping to calm frayed nerves with a smoke -- or in this case, a vape. 
  
 This hostess, though, paid an unusual price for her e-cig use, according to a case study published Thursday in the medical journal Pediatrics. As usual for a patient report, the authors did not disclose the young woman's name to protect her privacy. 
  
 E-cigarettes heat liquid and turn it into vapor, which a user inhales and then exhales in a large puffy cloud. The liquid is known as e-juice, and it contains flavorings, propylene glycol, glycerin and often nicotine -- though many users are unaware of this final addictive ingredient. 
  
 The hostess had been vaping for only about three weeks last year when she developed symptoms bad enough to send her to the emergency room of the University of Pittsburgh Medical Center. 
  
 There, doctors recorded her issues: cough, difficulty breathing that was worsening by the minute, and sudden stabbing pains in the chest with every inhalation and exhalation. Not yet feverish, she showed no upper respiratory symptoms such as a runny nose or nasal congestion. In the past, she said, the only lung problems she had were from mild asthma, which rarely required the use of an inhaler. 
  
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Student:
News of one scary vaping experience follows another. Days after authorities confirmed a Florida man died when his vape pen exploded, sending projectiles into his brain, a study published in the journal Pediatrics tells of an 18-year-old Pennsylvania woman who ended up in an emergency room with a cough and stabbing chest pains after trying vaping for only a few weeks. The condition of the unnamed woman with mild asthma only worsened after she was given antibiotics. She eventually suffered respiratory failure and had to be put on a breathing machine because "she was unable to get enough oxygen into her blood from her lungs," one of her doctors, Daniel Weiner of the University of Pittsburgh Medical Center, tells CNN. The woman also required tubes in her chest to drain fluid from her lungs—a result of hypersensitivity pneumonitis, otherwise known as wet lung. The condition is marked by an inflammation of the lungs caused by an allergen, like dust. In this case, doctors blame the chemicals in the e-cigarette the woman used, perhaps including propylene glycol, glycerin, and nicotine. Casey Sommerfeld, another of the woman's doctors, notes the immune response to such irritants "can lead to increased inflammation and 'leaky' blood vessels, which can lead to fluid accumulation in the lungs." However, the study authors note "this is the first reported case of [wet lung] and acute respiratory distress syndrome as a risk of e-cigarette use in an adolescent, and it should prompt pediatricians to discuss the potential harms of vaping with their patients," per the Sacramento Bee. Given a drug for severe allergic reactions, the woman in this case was back to breathing on her own after five days. ("Dripping" is another vape-related concern.)