Fig. 2

Assessment of the optimal ELISA cutoff in lung injury detection. The figure depicts the graphical representation of the logit function obtained for the M, S, and N proteins, with samples labeled according to the presence or absence of lung injury (blue = absence; yellow = presence). The OD value (cutoff) for the ELISA to differentiate individuals at high risk of lung injury (OD = 1.5), as determined by Youden’s index, is shown.