Medically reviewed by Laura Young, MD Key Takeaways A positive herpes IgG test result means you have or had a herpes infection.The herpes IgG test doesn't detect the virus itself; it detects ...

A positive rubella IgG test indicates immunity to rubella, meaning that the pregnant person and the fetus cannot contract this virus. If a person contracts rubella, also known as German measles, ...

Rubella antibodies in the blood mean that a person’s immune system has developed a response to the rubella virus. A positive result for rubella immunoglobulin (IgG) antibodies means a person is immune ...