Epidemiology / Tropical Medicine / Public Health / Ethiopia / Adolescent / Tropical medicine (Health Sciences) / Serology / Humans / Female / Animals / Male / Young Adult / Aged / Prevalence / Middle Aged / Adult / Public health systems and services research / Cross Sectional Studies / Tropical medicine (Health Sciences) / Serology / Humans / Female / Animals / Male / Young Adult / Aged / Prevalence / Middle Aged / Adult / Public health systems and services research / Cross Sectional Studies