Analysis of interviews with two groups of American mothers: (a) those intending to have their infants vaccinated and who either agreed with or did not question vaccination, or accepted vaccination but had significant concerns; (b) mothers who did not intend to vaccinate and who either completely rejected vaccination or purposely delayed vaccinating/chose only some vaccines. Knowledge about children's vaccines was poor in both groups.
Trust, or lack of trust in the medical profession and a relationship, for instance, with a paediatrician were pivotal in their decision-making.
Benin, A and others. Pediatrics 117(5): 1532-1541, May 2006. Abstract: http://pediatrics.aappublications.org/