**3. Statistical Analysis**

Clinical and immunological data of patients were analyzed using Fisher's exact test and the chi-squared test. A *p*-value < 0.05 was considered statistically significant. Univariate statistical analysis was performed using Graphpad Prism software version 8.2.1, whereas multivariate logistic regression data analysis was performed by Epi Info™ CDC software version 7.2 (available at https://www.cdc.gov/epiinfo/index.html; accessed on 15 April 2023).
