In a routine examination, some blood is taken and analyzed. The results show a high IgM titer for the mumps virus but a low IgG anti- mumps titer. This would indicate the person
A) is allergic to mumps.
B) is immune to mumps.
C) has just recovered from mumps.
D) was recently infected with mumps.
E) is relying on passive immunity.

Question

Quizplus · Accepted Answer

A high IgM titer indicates a recent infection, as IgM is the first antibody produced in response to an infection. A low IgG titer suggests that the person has not yet developed long-term immunity, which would be indicated by higher IgG levels.

In a Routine Examination, Some Blood Is Taken and Analyzed