Which of the following positive antibody tests may be an indication of recent vaccination or early primary infection for rubella in a patient with no clinical symptoms?

Question

Quizplus · Accepted Answer

IgM antibodies indicate recent infection or vaccination, while IgG antibodies indicate prior immunity. Presence of both IgG and IgA antibodies may also indicate recent infection or vaccination, but it is not specific for rubella. A fourfold rise in titer for IgG may indicate recent infection, but it is not specific for rubella and may also be seen in response to other infections or vaccinations.

Which of the Following Positive Antibody Tests May Be an Indication