The definition of an excerpt is a quote from a book or film. An example of excerpt is a passage from a novel. Excerpt is defined as to select quotations. An example of excerpt is to choose a passage to cite in a research paper. excerpt to select, take out, or quote (passages from a book, sequences from a film, etc.); extract
Public health surveillance. Public health surveillance is the continuous, systematic collection, analysis and interpretation of health-related data needed for the planning, implementation, and evaluation of public health practice. Such surveillance can: serve as an early warning system for impending public health emergencies;
Passive versus Active Surveillance. Passive Surveillance: While reporting is required by law, there is no practical way of enforcing adherence, so disease frequency is under reported. Nevertheless, this system has proven to be useful in identifying outbreaks and trends over time.