Vaccination of animals against disease protects them from suffering. However, this comes with an animal welfare cost - the safety and efficacy of vaccines is assessed in experimental animals and the tests involved can cause significant pain and distress. There is an ethical dilemma in protecting one set of animals at the expense of others but implementation of the 3Rs can help to resolve this. The research animals department works with researchers involved in vaccine testing and regulators to promote the 3Rs in this important area.

The mission statement of the 3Rs-Centre Utrecht Life Sciences (ULS) is to stimulate the development, acceptance and implementation of methods which can Replace, Reduce and Refine (the 3Rs) animal experiments. The centre is affiliated with Utrecht Life Sciences and provides information and advice to the Animal Welfare Body of both Utrecht University and the University Medical Centre Utrecht.

ICLAS is an international scientific organization dedicated to advancing human and animal health by promoting the ethical care and use of laboratory animals in research worldwide.