SARS-CoV-2 antibody testing, including IgG testing, can be accurate under certain circumstances, but there are limitations to the accuracy of these tests.

IgG antibodies are a type of antibody that the body produces in response to an infection with SARS-CoV-2. The presence of IgG antibodies in a blood sample can indicate that an individual has been infected with the virus and may have some degree of immunity to future infections.

However, the accuracy of antibody tests can vary depending on several factors, including the timing of the test relative to the onset of symptoms or exposure to the virus, the quality of the test kit used, and the specific characteristics of the individual being tested.

It is also important to note that while the presence of IgG antibodies may indicate prior infection, it does not necessarily mean that an individual is completely immune to future infections or that they cannot transmit the virus to others.

In summary, while SARS-CoV-2 antibody IgG testing can be useful in certain situations, it is important to interpret the results in the context of other clinical and epidemiological factors, and to use the results to inform clinical decision-making in consultation with a healthcare provider.