Some COVID-19 tests look for the virus (SARS-CoV-2) that causes COVID-19 and some tests measure antibodies our body creates to fight the virus. The black line below shows the virus during infection and the orange lines shows two types of antibodies that our body creates after we have been infected. This chart illustrates how SARS-CoV-2 (Virus) and antibody testing related to each other and is based on what is known as of May 2020.
