For questions 56 – 60, choose the answer (A, B, C, or D) which you think fits best according to the text.
Dr. Jonas Salk is credited with developing the first vaccine to fight against dreaded polio. Born in New York in 1914, Salk received his medical degree from New York University College of Medicine in 1939 and later attended the School of Public Health at the University of Michigan.
Salk was very interested in preventive medicine. He worked for the army on producing a vaccine against influenza for five years from 1942 to 1947. In 1949, a group at Harvard University led by John Enders developed a method to grow the poliovirus in quantity so that it could be studied further. This discovery was important as it allowed Salk and his fellow workers to study the disease in greater detail.
By 1952, Salk’s group had successfully tested a polio vaccine using an inactive poliovirus. In 1954, there were field tests done on a large scale. Initially, there were many different vaccines being used among the public, and there were some deaths associated with the vaccinations. However, Salk’s vaccine proved to be the best and was used without further problems. What was once a dreaded killer had been tamed by the work of Dr. Jonas Salk and co-workers.
Which of these statements is true about John Enders?
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Lời giải:
Báo saiGiải thích: By 1952, Salk’s group had successfully tested a polio vaccine using an inactive poliovirus. => Đến năm 1952, nhóm của Salk đã thử nghiệm thành công vắc xin bại liệt sử dụng vi rút bại liệt không hoạt động.
Tạm dịch: Câu nào trong những câu này đúng về John Enders?
A. Anh ấy đã làm việc cho nhóm của Tiến sĩ Salk
B. Anh ta trợ giúp Br. Nhóm của Salk
C. Anh ấy đã phát triển một loại vắc-xin bại liệt
D. Anh ấy đã tìm ra cách tiêu diệt virut bại liệt