VPH-0001
QUESTION
An investigation involving the collection of information and in which a causal hypothesis is usually not tested is called?
OPTIONS
(A) Survey
(B) Surveillance
(C) Synergism
(D) None
ANSWER
(A) Survey
EXPLANATION
A survey is the collection of information from a defined population and is usually descriptive rather than designed to test a causal hypothesis. Surveillance is continuous systematic collection and use of health data, synergism is interaction producing a combined effect, and “none” is therefore incorrect.
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