It is not entirely certain whether it is accurate.
Antigen kits usually have CT marks, that is, quality control areas and detection areas. It is not completely certain whether antigen kits without quality control area and detection area marks are accurate.
Generally, the antigen test results can be judged by the discoloration of the quality control area and the detection area. Antigen kits produced by some manufacturers may not have CT marks due to printing defects, making it difficult to judge the results.