Medical & Biological Laboratories Co., Ltd. has started the sale of SARS-CoV-2 Neutralization Antibody Detection Kit (hereinafter referred to as the Kit), a reagent for basic research that measures SARS- CoV-2 neutralizing antibodies in the blood. The Kit was developed through a joint research project between the Company, Keio University School of Medicine, and JSR Corporation. The Kit is expected to help evaluate neutralizing antibody induction during vaccine development, and facilitate research for selecting blood with neutralizing activity, which will be necessary for convalescent plasma therapy. Neutralizing antibody: When SARS-CoV-2 enters the body, a large number of antibodies will be produced against the virus as a means of protection from infection. Neutralizing antibodies are antibodies that inhibit binding of viruses to human cells. Convalescent plasma therapy: Convalescent plasma therapy uses plasma from patients who have recovered from viral and other types of infection in treating patients with the same disease.