... issue). In addition, immunization involves many clinical and admin-istrative tasks, including purchasing vaccines, managing inventories, de-termining immunization status and eligibility, counseling ... for the vaccinebut not others, and the physician must either provide differential servicedepending on children’s insurance status or find a way to pay for those96 FINANCING VACCINES IN THE ... al.,1994b). Other factors cited include convenient location, no appointmentneeded, recent relocation, and other access advantages. In another study,86 FINANCING VACCINES IN THE 21ST CENTURYlack of insurance...