Table 4.
Summary of findings
| Authors | Year | Country | Sample size | Vaccine hesitancy measures used | Main determinants of influenza vaccine hesitancy |
|---|---|---|---|---|---|
| Blanchard-Rohner et al. | 2012 | Switzerland | 261 | Self-reported vaccine uptake (yes/no) |
Lack of information by health care professionals Belief that vaccine is unsafe during pregnancy Anti-vaccine attitude |
| Bödeker et al. | 2014 | Germany | 1030 | Self-reported vaccine uptake (yes/no) |
Lack of trust in vaccine Belief that vaccine is not necessary Lack of knowledge about the importance during pregnancy Anti-vaccine attitude |
| Bödeker et al. | 2015 | Germany | 838 | Self-reported vaccine uptake (yes/no) |
That flu shot is not necessary Lacking awareness of influenza vaccination recommendations for pregnant women Mistrust in vaccine |
| Descamps et al. | 2019 | France | 11,752 | Self-reported vaccine uptake (yes/no) |
Multiparity Less than postgraduate education |
| Maltezou et al. | 2019 | Greece | 304 | Self-reported vaccine uptake (yes/no) |
Fear of adverse events (for them or the fetus) Influenza vaccination is not necessary No risk to get influenza Against all vaccinations |
| Maurici et al. | 2015 | Italy | 309 | Self-reported vaccine uptake (yes/no) |
No need for the vaccination Opposition to vaccination Flu shot not recommended |
| O’Shea et al. | 2018 | Ireland | 198 | Self-reported vaccine uptake (yes/no) |
Lack of recommendation by health care providers Lack of knowledge |
| Prospero et al. | 2019 | Italy | 266 | Self-reported vaccine uptake (yes/no) |
Drug objection Low risk perception |
| Tuells et al. | 2018 | Spain | 1569 | Self-reported vaccine status |
Unawareness of vaccine recommendation Belief that vaccination is not necessary |
| Vila-Candel et al. | 2016 | Spain | 200 | Medical records, immunization registry, and self-reported |
Underestimation of personal risk Lack of information |
| Wilcox et al. | 2019 | England | 314 | Self-reported vaccine uptake (yes/no) |
Concerns about side-effects Doubts about effectiveness Doubts about need |
Overview of the studies considered in the systematic review. Authors, year of publication, country of study collection, and number of participants are listed. Measurements of vaccine hesitancy are listed. Determinants were considered important when the authors of the original papers listed them in their discussion of the results