The head of a Geneva-based aid group on funding vaccinations in developing countries urged Japan on Friday to make larger financial contributions to saving children's lives in disease-stricken parts of the world.

Helen Evans, interim CEO of the Global Alliance for Vaccination and Immunization, who came to Tokyo on Wednesday on a three-day trip, emphasized the importance of financial contributions from Japan.

"There's a huge difference between the rate of immunization in the developed world and developing countries. (In developed countries,) we have access to good health care services, but for many people in developing countries, health care services don't exist, so children often die," she said.