Nigatu1,2 ,, W., D.J., N., B.J., C. ,, D. W.G., B. and A.J., V. 2017. Pre-and post-vaccine measles antibody status in infants using serum and oral-fluid testing: an evaluation of routine immunization in Addis Ababa, Ethiopia. The Ethiopian Journal of Health Development . 17, 3 (Jan. 2017).