1Ethiopian Public Health Institute, Addis Ababa, Ethiopia
2Department of Pharmacology, School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
*Corresponding Author:
Dereje Nigussie, Vaccines and diagnostic Production directorate, Ethiopian Public Health Institute, P.O. Box 1242, Addis Ababa, Ethiopia, Tel: +251911660850 Email: