A second, simple CE-marked point-of-care assay to differentiate viral from bacterial acute febrile respiratory infection, FebriDxTM (RPS Diagnostics, Sarasota, FL, USA), is a semi-quantitative test that combines the assessment of CRP and the myxovirus resistance protein 1 (MxA), a marker for viral infection, and provides results within 15 min [23]. Here, MX1 is linked to viral infectious disease.