Up to 10 million animals a year are used worldwide in the development, production and quality control of biologicals such as vaccines (e.g. diphtheria, tetanus and polio), immunoglobulins (e.g. snake antivenoms), blood products and hormones. More than two-thirds of these animals are used for routine quality control batch release tests of licensed products. These tests are expensive, can cause significant pain and distress to the animals and have a high degree of variability which may cause lengthy delays of up to a year to the release of some biologicals and vaccines.
With previous Bill & Melinda Gates Foundation fundingwe have reviewed the animal testing requirements in World Health Organisation (WHO) guidelines for the quality control and batch release testing of vaccines and biological therapeutics. This follow-on project funded by the Gates Foundation will support delivery of the 3Rs impacts of our recommendations, driving their implementation and accelerating the adoption of the latest non-animal testing methods by the global biologics community. Embracing the latest advances in replacement technologies will support faster access to cheaper vaccines by the communities who need them most urgently.
We aim to drive the global adoption of non-animal testing strategies in order to optimise quality control testing of biological products by:
Supporting the WHO in implementing the recommendations from our review.
Facilitating the uptake of existing non-animal technologies for batch release testing by global biologics manufacturers and regulators.
Supporting the development of new 3Rs approaches for batch release testing where they are needed most urgently, for example in assessing potency and neurovirulence.
Building an evidence base for the removal of obsolete animal tests.
New WHO 3Rs guideline: Open for second public consultation
A draft guideline, produced by the World Health Organization (WHO) on the replacement or removal of animal tests for the quality control of biological products, is currently open for a second public consultation. The intention of this guidance is to support manufacturers and regulators to implement the 3Rs while product-specific WHO guidelines are being updated to integrate alternative approaches.
The closing date for comments is 19 September 2025 and comments will be considered by the Expert Committee on Biological Standardization at its 81st meeting in October 2025.