At this writing, at least six bills are pending before the Congress of the United States which would impose restrictive measures upon the use of vertebrate animals in research, experiments, testing, and training. Similar legislative measures have been introduced from time to time for nearly 75 years, but Congress, in its wisdom, has maintained a balance of judgment in recognizing that in a choice of interests between man and animal that of man comes first.
The objections most frequently raised by the antivivisectionists have been (1) that a number of experiments are conducted which result in pain to the animals, (2) that animal facilities for medical research are often inadequate, and (3) that upon occasion animals have been illegally obtained for experimental purposes. Any responsible scientist will freely admit that certain necessary experiments cannot be conducted without some discomfort to the animal just as is also true for the pain
Allen JG. Pain and Common Sense. Arch Surg. 1963;86(6):883-886. doi:10.1001/archsurg.1963.01310120001001