Most other antibody tests only test 1 protein and 1 antibody. This is insufficient to get accurate results. That is why they can only get to about 60% accuracy rates.  This test will be able to use IGG, IGA, IGM antibody tests to analyze 4 different proteins and 3 different antibodies that are part of the virus.  This also means that if you have recovered from the coronavirus, it will be able to detect that in the IGG results. Based on previous experience with SARS-CoV the antibodies were present 180-240 days later. We do not have enough data to know how far back COVID-19 can be detected.