A positive herpes IgG test means you have a herpes infection or have had one in the past. The herpes IgG test detects antibodies, not the virus itself. A herpes IgG test is used if you have symptoms ...

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, ...

An elimination diet guided by a novel irritable bowel syndrome (IBS)–specific immunoglobulin G (IgG) assay reduced abdominal pain in a greater proportion of patients with IBS than a sham elimination ...

A recent study published in the journal of Mayo Clinic Proceedings predicted the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) natural infection in vaccinated ...

Hepatitis A blood tests check for immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies. An IgG-positive and IgM-negative result may suggest immunity to hepatitis A. A doctor may request a ...