FebriDx Interpretation
FebriDx was used according to the manufacturer package insert and a second physician was consulted to verify the results of all viral negative tests as well as those where the physician performing the test requested help interpreting the colour saturation of the FebriDx test lines. Consistent with previous studies24,25, an elevation of MxA with or without elevation in CRP was interpreted as a viral infection; and an elevation in CRP without MxA was interpreted as a bacterial infection. The absence of an elevation in either CRP or MxA was interpreted as negative.