题目内容
Research on a polio vaccine took place in the 1930s, with little success. In the late 1940s, the National Foundation for Infantile Paralysis (NFIP), nicknamed the March of Dimes for millions of contributors giving a dime to the cause, began sponsoring research on a polio vaccine. In 1959, the Foundation announced it would conduct field trials of a vaccine, led by Jonas Salk (1914–1995).
查看答案
搜索结果不匹配？点我反馈
更多问题
By 1956, 75% of children, ages 5–12, had received the polio vaccine in the US. In 1957, the incidence of polio dropped to 3 per 100,000. Although the polio vaccine clinical trial was a major victory in the fight against childhood diseases, it did raise some ethical concerns.
A hospital should set up an institutional ethics committee when possible to help resolve ethical issues within the hospital.
The Declaration of Helsinki (2013) by WMA contains 37 Articles.
There are three main goals of scientific research:
微信支付 
支付宝支付