This book is part of the trilogy health - research - development, after provincial division in DR Congo following the reform consecutive to the decentralization, the province has not experienced a boom in the scientific field due to the modest means both logistic and financial. To overcome this challenge, a group of researchers, each in their own field, have embarked on research to try to solve certain problems encountered by the population that hinder its development. This is a collection of three scientific research texts specifically in the field of ophthalmology, vaccinology and public health.