SARS-CoV-2 Semi-Quantitative IgG Antibody, Spike is a specialized test that measures IgG antibodies specifically against the SARS-CoV-2 spike protein to assess immune response to COVID-19 infection. This test provides both qualitative detection and semi-quantitative measurement of antibody levels, offering insight into the strength of the immune response. IgG antibodies typically develop 8-11 days after symptom onset and can persist for weeks to months following infection. The semi-quantitative nature of this test allows healthcare providers to assess the magnitude of the antibody response, which may correlate with the severity of infection or immune protection. This test is particularly valuable for evaluating patients with suspected COVID-19 exposure, monitoring immune response in recovered patients, and assessing antibody levels in individuals who may have experienced asymptomatic infection.