The Health Information and Quality Authority (HIQA) has advised that, in order to assess vaccine safety, they carried out a comprehensive, independent review of all available safety data. A systematic review of all relevant international literature was preformed which encompassed 70,000 trial participants and surveillance of many millions of individuals in cohort studies and had a follow up of up to 10 years. This review, which concluded that the vaccine was safe, included Ireland-specific safety data from the Health Products Regulatory Authority (HPRA).
The HIQA economic model, which assessed the cost-effectiveness of the vaccine, required an estimate of the hospitalisation rate associated with HPV vaccination. In the absence of relevant Irish data, evidence from the Norwegian Medicines Agency, which does report these data, were used.