Management System Certification Service

The WHO Performance, Quality and Safety (PQS) process

The vaccine supply chain involves not only manufacturing the vaccine contents, but also using temperature-controlled storage to help maintain vaccine quality from production to patient.

To engender confidence in their choice of products for use in immunization programs, UN member states and purchasing agencies may rely on the WHO Performance, Quality and Safety (PQS) process. PQS prequalifies devices for use based on performance relative to applicable standards, quality and reliability characteristics needed for use in challenging environments and safety characteristics that protect people and the environment throughout the course of the product's life cycle.

Products that have been tested and found to meet the applicable specification standards are listed in the WHO PQS Devices Catalogue, which includes information aimed at helping purchasers make informed choices.