Vivisection is the practice of torturing and killing innocent lives, allegedly in the name of altruism and compassion. This is why it has been criticized as far back as Shakespeare, formed the inspiration for Frankenstein, and why the likes of Mark Twain, Leo Tolstoy, and Gandhi were opposed to it strictly on moral grounds. Intuitively we know that if you seek to help someone, torturing innocent bystanders is morally perverse, like saving a village by destroying it.
No one is perfect. Everyone is open to criticism. Any individual or group can be examined and criticized where appropriate and fair. The misery and death perpetrated against nonhuman animals is an unfathomable catastrophic hell, and one should seek to improve the lives of victims whenever possible while pursuing an end to the practices. This is what we would do with a human rights situation and nonhumans deserve no less.
Many caring and concerned individuals both from the medical and local communities are asking if animal experimentation is beneficial to human health and medical research. (Ruesch 36) Because animal experimentation focuses on artificially inducing disease in perfectly healthy animals, and is undermined by the vast differences of non-human-animals versus humans anatomically, physiologically and pathologically, "it is inherently an unsound way to investigate the human disease process" (MMC 1) Approximately two hundred years ago the practice of vivisection began when religious leaders prohibited the dissection of human corpses.