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Table 2  Keywords for literature search

From: Determinants of influenza vaccine hesitancy among pregnant women in Europe: a systematic review

Vaccin* AND Influenza* AND Pregnan* AND Hesitan* AND Determin*
Immuniz*   Flu   Girls   Behavior   Factor
Immunis* Seasonal Influenza* Women Behaviour Predict*
Inoculat* Flu Shot Ladies Refus* Delay
  Pandemic Influenza* Expecting Mothers Decision Making Non-Acceptance
    Decision-Making  
    Choice*  
    Choose  
    Anti-Vaccine*  
    Concern*  
    Perception*  
    Confidence  
    Trust  
    Doubt*  
    Skepticism  
    Unsure