BMC Public Health 2009, 9:258 http://www.biomedcentral.com/1471-2458/9/258 Authors' contributions LM contributed to the design, carried out the data collec- tion and analysis, and drafted the manuscript. LY concep- tualized and supervised the project, discussed emerging codes, checked the final coding, and edited the manu- script. Both authors read and approved the final manu- script. Additional material Additional file 1 Description of pandemic influenza. A definition of pandemic influenza provided to the participants as a stimulus card during the focus groups and interview. Click here for file [http://www.biomedcentral.com/content/supplementary/1471- 2458-9-258-S1.pdf] Acknowledgements The authors would like to thank the medical team that helped develop the descriptions of the behaviours important to infection control: Professor Paul Little, Dr Bill Carman, Dr Michael Moore, Dr Douglas Fleming and Dr Ian Williamson. References 1. 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