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A compilation of the various models proposed to describe vaccine hesitancy. (a) The “Three C’s” model of vaccine hesitancy proposed by Macdonald, (b) “Vaccine Hesitancy Continuum” proposed by Sage Working Group, (c) “The 5C Psychological Antecedents of Vaccination” proposed by Betch et al., and (d) “Types of Vaccine Hesitancy” proposed by Hagood and Herlihy.
