A campaign is an intensive educational activity for motivating and mobilizing a community to act to solve a problem or satisfy a need urgently felt by it. The duration of a campaign may be for a single day or a scheme like deworming for a few weeks, for a month or for a few years. A campaign may be held by involving a small number of people in a few villages or by involving an entire community in a block or district or state or the nation or the whole world. In a campaign, certain themes may be organized only once or may be repeated year after year till the goal is satisfactorily reached.