According to the logo on this graph, it only works 7 days after symptoms appear: https://coronachecktest.com/wp-content/uploads/2020/03/antibody-chart-cropped-1

According to the logo on this graph, it only works 7 days after symptoms appear: https://coronachecktest.com/wp-content/uploads/2020/03/antibody-chart-cropped-1.jpg https://coronachecktest.com/wp-content/uploads/2020/03/antib...