On the one hand people think that use animals to test the scientist’s ideas don’t harms to animals and also that test with them produce a lot of beneficial for human’s quality of life. But on the other hand people think that test with animals isn’t safe for the animals and that the animals are like humans.
Test with animals can improve the quality of human’s life for example if a scientist invents a vaccine for some illness can be dangerous, and if you test it before on a animal you can know it.
However, this can hurt them, and animals are living like us.
I think that test with animals is a good idea if this can save the life of a human, because is taking a life to safe another, but I think that in other cases is unfair and unnecessary.