Table 1.

Details of eligibility criteria used for screening the studies

Inclusion criteria	Exclusion Criteria
- Included research into influenza vaccine, or other vaccine that may bear resemblance to future influenza vaccination programs	- Influenza vaccine candidate was not a focus of the paper
- Vaccine research was targeted at children under 5 years	- Vaccines targeted at the elderly
- Gave an indication of answerability, efficacy, effectiveness, deliverability, disease burden reduction or impact on equity of a vaccine	- Papers not directly relating to vaccine development and its impact