Transparency is a key principle of WHO prequalification. For each vaccine that is prequalified WHO therefore posts on this website a WHO Public Assessment Report which can be accessed via this website:

• WHO Public Assessment Reports (WHOPARs)

A WHO Public Inspection Report (WHOPIR) is posted following inspection of the manufacturing site of a Vaccine. WHOPIRs are posted only for those sites that have passed inspection and can be accessed via this website:

• WHO Public Inspection Reports (WHOPIRs)

Another key prequalification output, of particular interest to regulators and procurers, is the WHO List of Prequalified Vaccines.