“…Some studies have focused on the vaccinators' theoretical knowledge of vaccinations and vaccination programs, finding that such knowledge varied largely, and, according to many studies, did not always meet the requirements. In particular, contraindications of vaccinations were not clear to vaccinators (Cohen, Lauderdale, Shete, Seal, & Daum, 2003; Dabas et al, 2005; de la Hoz, Perez, Wheeler, de Neira, & Hall, 2005; Harr, Hammar, & St.John‐Seed, 2001; Petousis‐Harris, Goodyear‐Smith, Turner, & Soe, 2004, 2005). Vaccinating has also been examined from the practical point of view, such as injection techniques.…”