Answer to Question 1
ANS: A
The Epstein-Barr virus is the causative agent for infectious mononucleosis. It is found in body fluids, especially saliva, in infected individuals.
Answer to Question 2
ANS: C
Performing a test for the presence of the heterophil antibody is used to diagnose infectious mononucleosis. If this test is negative and the clinician is highly suspicious of the diagnosis, then tests for more specific Epstein-Barr virus antibodies may be necessary.