Detecting with 98% accuracy SARS-CoV-2 IgG and IgA Antibodies in Human Plasma and serum Samples by ELISA. Highly sensitive and specific ELISA Test to detect whether the immune system has reacted to SARS-CoV-2. Based on CSIC Assay about Cysteine-like Protease Protein (Mpro). Developed and Manufactured in Spain.