MiRXES Fortitude Kit 2.1 is is a multiplex real-time PCR assay targeting the conserved regions ORF1ab region 1 (FAM) and ORF1ab region 2 (HEX) coupled with an internal spike-in plasmid control. 

Limit of detection (LoD): 10 copies per reaction

No cross-reactivity with:

• SARS-CoV-1 (SARS, identified in 2003)
• Influenza A H1N1
• Influenza A H3N2
• Influenza B
• MERS-CoV or EMC/2012 (MERS, identified in 2012)

More than 7 million Fortitude COVID-19 tests have been shipped to 13 hospitals and clinical labs in Singapore, and to more than 45 countries worldwide. Fortitude Kit 2.1 has received CE Mark and regulatory approval in Singapore, Philippines, Panama, Peru, Colombia, and Honduras.

Detects all variants of concern, including Delta and Omicron, as of 29 November 2021.