Answer:
to promote healthful practices and an awareness of actual and potential illnesses
Step-by-step explanation:
The main idea of using propaganda in public health campaigns is to try and promote healthful practices and awareness of actual and potential illnesses that could harm the general public, this is in order to take advantage of the different media that we have at our dissposal in order to show healthier ways of living for people, and in the meanwhile showing them how diseases and habits could affect the potential illnesses that could harm them.