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Updated 28 January 2004, 14.35 

Practical arguments
Animal testing has helped to develop vaccines against diseases like rabies, polio, measles, mumps, rubella and TB.
Antibiotics, HIV drugs, insulin and cancer treatments rely on animal tests. Other testing methods aren't advanced enough.
Scientists claim there are no differences in lab animals and humans that cannot be factored into tests.
Operations on animals helped to develop organ transplant and open-heart surgery techniques
Moral arguments
- Human life has greater intrinsic value than animal life.
- Legislation protects all lab animals from cruelty or mistreatment.
- Millions of animals are killed for food every year - if anything, medical research is a more worthy death.
- Few animals feel any pain as they are killed before they have the chance to suffer.
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