Another question is the predictive power of evaluation of ciliary methylation levels for the development of respiratory symptoms: hypermethylation and repression of FOXJ1 and DNAH5 in nasal mucosa at 4–8 weeks post-infection are expected to forecast the persistence of cough and dyspnea over 3–12 months, building on evidence of sustained ciliary gene repression tied to symptom trajectories [30,31]. Here, FOXJ1 is linked to infection.