Frequently Asked Questions

Cepheid developed the Xpert® Xpress CoV-2 plus test with several enhancements compared to the Xpert® Xpress SARS-CoV-2.  Key enhancements include:

  • The addition of a 3rd gene target for SARS-CoV-2 (RdRP now included in addition to E and N2), to be more robust against mutations
  • Improved Time to Result (TTR) at about 30 minutes
  • Expansion of on-label transport media options to include the addition of eNAT®

Sample Types:

GeneXpert Dx and Infinity Systems: Nasopharyngeal swab and anterior nasal swab in 3mL of viral transport media (UTM/VTM), 3mL of Saline, or 2mL of eNAT, from individuals meeting COVID-19 clinical and/or epidemiological criteria, as well as individuals without symptoms or other reasons to suspect COVID-19 infection.

Viral transport media are available from several commercial vendors who may use the terminology VTM (Viral Transport Medium) or UTM (Universal Transport Medium). Any brand meeting the guidelines for VTM/UTM can be used. UTM, VTM, Saline, and eNAT are on label.

  • SARS-Related Coronavirus 2 (SARS-CoV-2) External Run Control, Catalog# NATSARS(COV2)-ERC
  • SARS Associated Coronavirus 2 (SARS-CoV-2) Negative Control, Catalog# NATSARS(COV2)-NEG

These are described in the “materials available but not provided” section of the package insert as the recommended source for external controls. Please consult with Cepheid’s Technical Support team to inquire about other commercial sources for QC material. 

In an effort to reduce our environmental footprint, Cepheid is moving towards CD-less products.  The Package Inserts, ADFs and ADF import instructions for the Xpert® Xpress CoV-2 plus test are available for download on this website (see above).  For customers who prefer to obtain the ADFs in a CD, please fill out the CD ADF request using the following link:


Educational Materials