IL6 and susceptibility to pneumonia measurement: Regarding the clinical characteristics of patients as a function of vaccination status (Table 3), the prevalence of pneumonia resulted in being significantly higher (74.8%) among unvaccinated subjects, while the value of IL-6 (median: 34.5 pg/mL; IQR: 14.7–79.2 pg/mL) was found to be higher in the vaccinated patient group.