The BEI Resources catalog contains more than 380 SARS-CoV-2 isolates and unique reagents representing ten Variants Being Monitored and the Variant of Concern Omicron. Recent additions include monoclonal antibodies to SARS-CoV-2 Spike glycoprotein receptor binding domain (RBD) and an isolate of lineage BA.5, now the dominant lineage in the United States...more.