Fig. 1.

The dynamic changes of lymphocyte count [panel a–f] and neutrophil to lymphocyte ratio [panel g–l] in patients hospitalized with respiratory virus infections by Legendre orthogonal polynomials.

Note: N^best refers to the appropriate order of fit for LOP by the Bayesian information criterion method. Other respiratory viruses included respiratory syncytial virus, parainfluenza virus, human rhinovirus, coronavirus, human metapneumovirus and adenovirus.

Abbreviations: SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; LOP, Legendre orthogonal polynomials.