Procedures set out in the standard operating procedures (SOPs) are followed by the PQS Secretariat, the PQS Working Group and by all technical specialists commissioned by the Secretariat. They are a useful source of information for manufacturers seeking prequalification of an immunization product since they describe and illustrate with examples the steps of a procedure, making it transparent for all stakeholders. They also indicate key responsibilities among those implementing the procedures.

Current SOPs are as follows:

SOP 001: How to develop and publish a PQS product performance specification (1 April 2020)

SOP 002: How to review and revise a PQS product performance specification (1 April 2020)

SOP 003: How to withdraw a PQS product performance specification (1 April 2020)

SOP 004: How to develop and publish a a PQS product verification protocol (1 April 2020)

SOP 005: How to review and revise a PQS product verification protocol (1 April 2020)

SOP 006: How to withdraw a PQS product verification protocol (1 April 2020)

SOP 007: How to assess a laboratory for PQS accreditation (1 April 2020)

SOP 008: How to re-evaluate a WHO PQS-accredited test laboratory (1 April 2020)

SOP 009: How to evaluate applications for product prequalification (1 April 2020)

SOP 010: How to re-evaluate a prequalified PQS product (1 April 2020)

SOP 011: How to remove a prequalified product from the PQS database (1 April2020)

SOP 012: How to field test a PQS product (1 April 2020)

SOP 013: How to obtain feedback on the performance of a PQS product (1 April 2020)

SOP 14: How to audit a laboratory for PQS accreditation (1 April 2020)