You seem to present your argument as if animal experimentation is actually scientific and leads directly to an applicable cure in humans.
You may feel there's no evidence but I think things such as:
-Helping 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 currently.
- Operations on animals helped to develop organ transplant and open-heart surgery techniques.
... is science advancing to reduce suffering with the assistance of animal testing at various stages. It's great now that we're starting to get more computerised methods and knowledge so laws allow more human testing. You can't say that for the earlier generations that had no access to those technologies we have now and required a polio vaccine pronto.
You seem to present your argument as if animal experimentation is actually scientific and leads directly to an applicable cure in humans. If it were the case that simple animal experimentation could lead us to a cure, then your utilitarian stance would be viewed (somewhat) differently, but, what about the millions of animals that continually suffer and die for absolutely no change to be made in the human condition? Wouldn't a utilitarian say that there is no end to justify the means...it's just wasted lives?
Here's the 2010 US government statistics for animal research:
http://speakingofresearch.files.wordpress.com/2008/03/2010_animals_used_in_research.pdf
This article breakdowns the numbers:
http://speakingofresearch.com/facts/statistics/
Speaking of Research said:
Let us put the number of animals used in perspective. Scientists in the US use approximately 26 million animals in research, of which only around 1 million are not rats/mice/birds/fish. We use fewer animals in research than the number of ducks eaten per year in this country. We consume over 1800 times the number of pigs than the number used in research. We eat over 340 chickens for each animal used in a research facility, and almost 9,000 chickens for every animal used in research covered by the Animal Welfare Act. For every animal used in research, it is estimated that 14 more are killed on our roads.
They also note that:
Speaking of Research said:
Government statistics show that the use of non-rodent animals has been declining over the past two decades.
But overall, the number of animals in research is steadily declining as our technology and knowledge improves. Those figures, I feel consumption of animals is more the concern than research, at least in countries that ensure that researchers do follow all welfare regulations.