English, 14.08.2020 01:01 dinadenoirefan
Jonas Salk (1914-1995). For the first half of the 20th century, poliomyelitis, also known as infantile paralysis, was one of the most dreaded diseases to attack young people. By 1955 American physician and researcher Jonas Salk had developed a vaccine that almost eradicated the disease in the United States and other developed countries. Jonas Edward Salk was born in New York City on October 28, 1914. He graduated from the City College of New York in 1934 and earned his doctorate in medicine from New York University's College of Medicine in 1939. While in medical school he had worked with Thomas Francis Jr. on killed-virus immunology studies. In 1942 he joined a group at the University of Michigan working on a vaccine against influenza. The vaccine was perfected in 1953. In 1947 Salk became associate professor of bacteriology and head of the Virus Research Laboratory at the University of Pittsburgh School of Medicine. There he began working on the polio vaccine. Three viruses caused polio, and a vaccine had to be effective against all of them. By 1952 Salk had developed such a vaccine and conducted field tests on children. His findings were published in 1953, and a mass field test was done the next year. On April 12, 1955, the vaccine was released for use in the United States. In 1957 Salk was named professor of experimental medicine at Pittsburgh, and in 1963 he went to San Diego as head of the Institute (later named the Salk Institute) for Biological Studies. In 1977 Salk was awarded the Presidential Medal of Freedom. He died on June 23, 1995, in La Jolla, California. Answer the following question based on the Compton's Encyclopedia reading: Which choice best describes the biggest impact of Jonas Salk's work with poliomyelitis? Jonas Salk became a professor of medicine and the head of the Institute for Biological Studies. Jonas Salk was celebrated for his work and awarded the Presidential Medal of Freedom. Jonas Salk created a vaccine that has nearly eliminated the disease in the United States and many other developed countries. Jonas Salk tested his vaccine on a large group of children and published his findings the following year.
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English, 22.06.2019 01:00
Which word in the sentence is the object of the preposition ? scrape the dishes and put them in the sink 1)in 2)them 3)dishes 4)sink
Answers: 1
English, 22.06.2019 09:00
Which of the following statements is most accurate? a. effective communication skills are not as important as technical skills. b. good communication skills can you in the classroom, on the job, and in your personal life. c. communicating effectively is not related to job success. d. learning to communicate effectively cannot be taught because communication skills are inborn.
Answers: 1
Jonas Salk (1914-1995). For the first half of the 20th century, poliomyelitis, also known as infanti...
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