About the test:
This test will help you understand how your immune system has
responded to a vaccination or an infection and will also help to confirm
whether the illness you had was COVID-19 or something else.
IgG levels often reduce quite quickly in the months after an infection
and this test will enable you to monitor your IgG antibody levels over
time to see if your levels are dropping to below the levels that may be
assumed to give immunity.