Fig 1.
Micro-level determinants of vaccine hesitancy following an extended version of the Theory of Planned Behavior (TPB).
Determinants are based on empirical and theoretical work from Ajzen [23], Schmiege et al. [25], Rhodes & Courneya [26], Koo et al. [27], Pomery et al. [28], Larson et al. [10]. Significant determinants from 470 research articles are clustered according to the model. Circle size represents the total number of reported incidents.
Table 1.
Keywords used for the literature search.
Fig 2.
Flow Chart of selection process.
Table 2.
Exclusion criteria used in selection process for literature review on influenza vaccine hesitancy.
Fig 3.
Total number of multivariate studies about influenza vaccine hesitancy by year of publication (2005–2015) and region (N = 470).
Fig 4.
Barriers to influenza vaccine uptake mapped onto the macro-level 4C model of vaccine hesitancy (complacency, convenience, confidence and calculation).
Total numbers of studies reporting the variable as either decreasing (white) or increasing (black) vaccine acceptance or inconclusive (circled number).
Fig 5.
Barriers to seasonal and pandemic influenza vaccine uptake for each risk group aggregated using the macro-level 4C model of vaccine hesitancy (complacency, convenience, confidence and calculation).
Bars visualize the total number of significant results supporting each reason for hesitancy for each risk group. Grey bars indicate the absolute proportion of results addressing pandemic influenza uptake among the total results. Black bars indicate the absolute proportion of results for seasonal influenza uptake among the total results.