MEASELS – IgG

Correct. The presence of IgG antibodies in the blood is an indication of immunity to measles or a past infection. IgG antibodies are produced by the immune system in response to the measles virus. Once an individual has been exposed to the virus or vaccinated against it, the immune system generates specific antibodies, including IgG, to recognize and defend against future infections. Measuring IgG antibodies in the blood is a common method for determining immune status and confirming past exposure or vaccination against measles.