COVID IgG positive means your blood contains IgG antibodies to SARS‑CoV‑2, indicating prior infection or a response to vaccination. IgG usually appears weeks after exposure and suggests some immune memory, but it doesn’t confirm current infection or guarantee protection from reinfection. Test timing, vaccination status, and possible false results affect interpretation—discuss your result with a healthcare professional.

Yes. Many laboratory COVID-19 antibody tests use ELISA (enzyme-linked immunosorbent assay) to detect IgM and IgG against viral proteins. ELISAs and other lab methods (e.g., chemiluminescent assays) are more sensitive and quantitative than rapid lateral-flow tests. Antibodies usually appear 1–3 weeks after infection or vaccination, so antibody testing isn’t reliable for diagnosing acute infection.

A COVID antibody (serology) test detects antibodies in a blood sample—commonly IgM and IgG—using laboratory assays (ELISA/chemiluminescence) or rapid lateral-flow tests. It indicates past infection or response to vaccination but does not reliably show current infectiousness or guaranteed immunity. Antibodies usually become detectable about 1–3 weeks after exposure; timing and test sensitivity affect results, so clinical context matters.

IgG ELISA is a laboratory test that detects and measures Immunoglobulin G (IgG) antibodies in blood serum or plasma. Antigens coated on a plate capture specific IgG from a patient sample; an enzyme-linked secondary antibody produces a measurable color change proportional to antibody amount. It’s used for serology to determine past infection, immunity after vaccination, or exposure to specific pathogens.

A positive IgG test means your immune system has produced immunoglobulin G against a specific pathogen, indicating prior exposure or vaccination and likely some degree of immune memory. It typically does not indicate active infection. The level and duration of protection vary, and results must be interpreted with clinical context (symptoms, timing, other tests). Consult your healthcare provider for personalized advice and next steps.

COVID‑19 IgG antibodies typically rise within weeks after infection or vaccination and remain detectable for at least 6–12 months in most people, though levels decline over time. Some individuals retain measurable antibodies beyond a year. Immune memory (B and T cells) can persist even when antibodies fall, helping protection; vaccine boosters are recommended to maintain stronger, longer-lasting immunity.