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.

In the odyssey which is most effective paraphrase of the passage

Which of the following is best written: 1. my favorite day of the year is july 24 my birthday 2. my favorite day, of the year, is july 24 my birthday 3. my favorite day of the year is july 24-my birthday 4. my favorite day of the year is (july 24) my birthday

Ajourney with my father adapted from my reminiscences by sir rabindranath tagore probably in order to teach me to be careful, my father placed a little small change in my charge and required me to keep an account of it. he also entrusted me with the duty of winding his valuable gold watch for him. he overlooked the risk of damage in his desire to train me to a sense of responsibility. when we went out together for our morning walk, he would ask me to give alms to any beggars we came across. but i never could render him a proper account at the end of it. one day, my balance was larger than the account warranted. "i really must make you my cashier," observed my father. "money seems to have a way of growing in your hands! " that watch of his i wound up with such indefatigable1 zeal that it had very soon to be sent to the watchmaker's in calcutta. i am reminded of the time when, later in life, i was appointed to manage the estate and had to lay before my father, owing to his failing eyesight, a statement of accounts on the second or third of every month. i had first to read out the totals under each head, and if he had any doubts on any point, he would ask for the details. if i made any attempt to slur over or keep out of sight any item which i feared he would not like, it was sure to come out. so, these first few days of the month were very anxious ones for me. as i have said, my father had the habit of keeping everything clearly before his mind—whether figures of accounts, or ceremonial arrangements, or additions or alterations to property. he had never seen the new assembly hall built at bolpur, and yet, he was familiar with every detail of it from questioning those who came to see him after a visit to bolpur. he had an extraordinary memory, and when once he got hold of a fact, it never escaped him. my father asked me to copy the favourite verses, with their translation, from the book he liked reading every day. at home, i had been a boy of no account. here, when these important functions were entrusted to me, i felt the glory of the situation. 1. tireless 7 how does the narrator support the idea that his father keeps everything clearly before his mind? a. by giving the example of his father's response when his account did not tally with the money that he had in hand b. by mentioning that his father was interested in everything that happened around him c. by giving the example of his father knowing every detail of the new assembly hall at bolpur d. by mentioning that his father had marked his favorite verses from his favorite book