The tenderer shall register water consumption and occurrences of gastroenteritus in a selection of the Norwegian population over the course of one year via a telephone interview (recruitment), web questionnaire and a monthly SMS questionnaire.
The aim of the study is to get a better general picture of how drinking water contributes to illness in Norway. Better knowledge of the extent and reasons for infections spreading through drinking water can give a basis for prioritising disease preventive measures in the water supply systems.