Figure 1. This figure illustrates the main symptom clusters commonly described in POIS, including general complaints (fatigue, palpitations, irritability, depressed mood), flu-like manifestations (feverish sensation, perspiration, shivering, malaise), neurocognitive symptoms (headache, Dysarthria, photophobia, phonophobia), oropharyngeal symptoms (Dysgeusia, Dry mouth, Sore Throat, hoarseness), ocular symptoms (Ocular burning, conjunctival injection, blurred vision, lacrimation), musculoskeletal symptoms (myalgia, neck or back muscle tension, muscle weakness, muscle stiffness), and nasal symptoms (congestion, rhinorrhea, sneezing).