The New England Anti-Vivisection Society (NEAVS) is a group of people who believe that it is not right to harm animals in any way for the purpose of doing scientific experiments on them. They think that animals have feelings just like humans do and that they should not be used for testing medicines or other products.
NEAVS works to educate people about why it is wrong to use animals in experiments, and they also work to advocate for changes in laws that allow this kind of testing to happen. They believe that there are other, more humane ways to do scientific research that do not involve hurting animals.
In short, NEAVS is a group of people who want everyone to treat animals with kindness and respect, and not to use them for experiments or other purposes that could cause them harm.