COVID-19 antibody testing at North Caddo Medical Center Fri, 05/01/2020 - 12:00am COVID antibody screening is one of the latest developments in the COVID crisis. The test determines if antibodies are present ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today! Read more about COVID-19 antibody testing at North Caddo Medical Center