yes, there are plenty of ethics laws, and the general principle in science is: if there are alternatives to animal testing, use that. if there is no alternative, only carry out the experiment if it provides valuable information, and if you do carry out animal experiments, make it as humane as possible. this was repeated to us every fucking semester for 5 years at uni and 5 years of phd. and you can't just ignore this shit, you have to go through the ehics board to get an animal experiment going. but if you ever want new and better medicine, or you want to understand how life works on a fundamental level, you need animal experiments. you try to work on simpler organisms if you can, that don't have pain receptors, like yeast or bacteria. anyone who says we should stop this progress puts the wellfare of animals over the wellfare of humans and is therefore an enemy of humanity.
Hungary