The V-PLEX SARS-CoV-2 Panel 26 (Mouse IgM) Kit is a qualitative multiplex serology assay for mouse antibodies to eight RBD antigens from variants of SARS-CoV-2. It includes antigens from the Alpha, Beta, Gamma, and Delta variants in addition to three of the most prevalent sublineages of the Omicron variant. Panel 26 has RBD antigens from the following lineages: A (WT), (AY.3; AY.4; AY.4.2; AY.5; AY.6; AY.7; AY.12; AY.14; B.1.617.2; B.1.617.2+ΔY144), (B.1.1.529; BA.1; BA.1.15), (BA.1.1; BA.1.1.15); (BA.2; BA.2.1; BA.2.2; BA.2.3; BA.2.5; BA.2.6; BA.2.7; BA.2.8; BA.2.10; BA.2.10.1; BA.2.12), (B.1.1.7), (B.1.351; B.1.351), and (P.1).