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Table 1 Inclusion and exclusion criteria for literature search

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

Study inclusion criteria Study exclusion criteria
Referring to seasonal influenza vaccination No reference to seasonal influenza vaccination
Focusing on factors or determinants of No inclusion of determinants or
influenza vaccine hesitancy factors of influenza vaccine hesitancy
Focusing on pregnant women No focus on pregnant women
Focusing on European countries No focus on countries in WHO European region
Published in English Published in languages other than English
Published between 01.01.2009 and 11.30.2019 Published before or after 01.01.2009 and 11.30.2019
Primary studies Secondary studies (meta-analysis or systematic
Peer-reviewed journal articles Gray literature
Humans Focusing on vaccine uptake rather than hesitancy