IN: Jonas Edward Salk (; October 28, 1914 - June 23, 1995) was an American medical researcher and virologist. He discovered and developed one of the first successful polio vaccines. Born in New York City, he attended New York University School of Medicine, later choosing to do medical research instead of becoming a practicing physician. In 1939, after earning his medical degree, Salk began an internship as a physician scientist at Mount Sinai Hospital.

In 1947, Salk became ambitious for his own lab and was granted one at the University of Pittsburgh, but the lab was smaller than he had hoped and he found the rules imposed by the university restrictive. In 1948, Harry Weaver, the director of research at the National Foundation for Infantile Paralysis, contacted Salk. He asked Salk to find out if there were more types of polio than the three then known, offering additional space, equipment and researchers. For the first year he gathered supplies and researchers including Julius Youngner, Byron Bennett, L. James Lewis, and secretary Lorraine Friedman joined Salk's team, as well. As time went on, Salk began securing grants from the Mellon family and was able to build a working virology laboratory. He later joined the National Foundation for Infantile Paralysis's polio project established by President Franklin D. Roosevelt. Extensive publicity and fear of polio led to much increased funding, $67 million by 1955, but research continued on dangerous live vaccines. Salk decided to use the safer 'killed' virus, instead of weakened forms of strains of polio viruses like the ones used contemporarily by Albert Sabin, who was developing an oral vaccine. After successful tests on laboratory animals, on July 2, 1952, assisted by the staff at the D.T. Watson Home for Crippled Children, Salk injected 43 children with his killed-virus vaccine. A few weeks later, Salk injected children at the Polk State School for the retarded and feeble-minded. In 1954 he tested the vaccine on about one million children, known as the polio pioneers. The vaccine was announced as safe on April 12, 1955. The project became large, involving 100 million contributors to the March of Dimes, and 7 million volunteers. The foundation allowed itself to go into debt to finance the final research required to develop the Salk vaccine. Salk worked incessantly for two and a half years. Salk's inactivated polio vaccine was the first vaccine for the disease; it came into use in 1955. It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.
QUESTION: What did he discover in his research?
IN: Hayworth was born in Brooklyn, New York, in 1918 as Margarita Carmen Cansino, the oldest child of two dancers. Her father, Eduardo Cansino Sr., was from Castilleja de la Cuesta, a little town near Seville, Spain. Her mother, Volga Hayworth, was an American of Irish-English descent who had performed with the Ziegfeld Follies. The couple married in 1917.

When Hayworth and Dick Haymes first met, he was still married and his singing career was waning. When she showed up at the clubs, he got a larger audience. Haymes was desperate for money, because two of his former wives were taking legal action against him for unpaid child support. His financial problems were so bad, he could not return to California without being arrested. On July 7, 1954, his ex-wife Nora Eddington got a bench warrant for his arrest, because he owed her $3,800 in alimony. Less than a week earlier, his other ex-wife, Joanne Dru, also got a bench warrant because she said he owed $4,800 in support payments for their three children. Hayworth ended up paying most of Haymes's debts. Haymes was born in Argentina, and did not have solid proof of American citizenship. Not long after he met Hayworth, U.S. officials initiated proceedings to have him deported to Argentina for being an illegal alien. He hoped Hayworth could influence the government and keep him in the United States. When she assumed responsibility for his citizenship, a bond was formed that led to marriage. The two were married on September 24, 1953, at the Sands Hotel, Las Vegas, and their wedding procession went through the casino. From the start of their marriage, Haymes was deeply indebted to the Internal Revenue Service (IRS). When Hayworth took time off from attending his comeback performances in Philadelphia, the audiences sharply declined. Haymes's $5000 weekly salary was attached by the IRS to pay a $100,000 bill, and he was unable to pay his pianist. Haymes' ex-wives demanded money while Hayworth publicly bemoaned her own lack of alimony from Aly Khan. At one point, the couple was effectively imprisoned in a hotel room for 24 hours in Manhattan at the Hotel Madison as sheriff's deputies waited outside threatening to arrest Haymes for outstanding debts. At the same time, Hayworth was fighting a severe custody battle with Khan, during which she reported death threats against their children. While living in New York, Hayworth sent the children to live with their nanny in Westchester County. They were found and photographed by a reporter from Confidential magazine. After a tumultuous two years together, Haymes struck Hayworth in the face in 1955 in public at the Cocoanut Grove nightclub in Los Angeles. Hayworth packed her bags, walked out, and never returned. The assault and crisis shook her, and her doctor ordered her to remain in bed for several days. Hayworth was short of money after her marriage to Haymes. She had failed to gain child support from Aly Khan. She sued Orson Welles for back payment of child support which she claimed had never been paid. This effort was unsuccessful and added to her stress.
QUESTION:
did she retire from film making or stop for a specific reason?