1. Department of Medical Laboratory Science, College of Medicine and Health Sciences, Bahir Dar University, 79 Bahir Dar, Ethiopia
2. Institute of Clinical Immunology, Medical Faculty, University of Leipzig, D‑04103 Leipzig, Germany
3. Institute of Medical Microbiology and Epidemiology of Infectious Diseases, University of Leipzig, D‑04103 Leipzig, Germany
4. Institute of Immunology, Friedrich Loeffler Institut, D‑17493 Greifswald Insel Riems, Germany