How could you ethically design a scientific study to determine whether mercury-containing vaccines cause ASD?
What will be an ideal response?
The best option is to compare rates of ASDs in children receiving vaccines with mercury-containing substances to rates of ASDs in children who have not received such vaccines. They should mention that the two groups should be similar in other parameters, such as gender. Students may note that it is unethical to do experiments on humans where there is some danger of causing lasting harm. They may also be aware that, at present, there is no known similar condition in other animals.
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