62 HCW compliance with seasonal and pandemic influenza vaccination ª 2013 Blackwell Publishing Ltd Relationship between seasonal and pandemic influenza vaccination and the effect of a threatened pandemic Current or past receipt of SIV is a consistent predictor of pandemic vaccine acceptance among HCWs 9, 11, 12, 14, 15, 21, 29, 42 ; however, several studies provide a less clear picture of the link between seasonal and pandemic vaccination behaviour.