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they must only be used if alternative non-animal models cannot answer the scientific question
If the test has risks we owe more responsibility to a human patient than an animal one.
humans are animals
Animal testing is not necessary but it is only evil. There are other methods that can be applied without harming animals like testing on synthetic cells. The firms do not use them generally only because of their costs and people's biased trust on animal testing.
are there circumstances where animal testing is not evil? Is there "humane" testing possible?
the accent is on 'necessary', not on 'evil'