Proficiency Testing/EQA / Microbiology / Bacteriology Help Please log in to determine if you are eligible to purchase PT Programs. NOROVIRUS - SP1 Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Analyte Challenges per Shipment Number of Shipments Norovirus 1 Two shipments per year Program Information One 1.0‑mL liquid specimen For use with molecular testing methods only Shipping Schedule Shipment A: May 15 Shipment B: October 30 Guest Log in/Register Customers Who Bought This Item Also Bought STOOL PATHOGENS VIEW DETAILS >