Part One

(A) Why are positive results from screenings not always goodenough before treatment is given?

(B) What is the importance of taking/using screenings andsurveillance together?

(C) What two reasons are given as to why a false alarm duringscreening may be controversial?

Part two

(A)Distinguish between the following terms and provide someexamples:

        – Primaryprevention

      – Secondary prevention

      – Tertiary prevention

(B) What do you understand by the following:

       – Reliability

      – Validity

(C) How are reliability and validity inter-related?

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