Assavanopakun, P., and N. Chaiear. “Measles Immunity Among New Health Personnel at a Faculty of Medicine in Khon Kaen Province, Thailand, 2019”. Outbreak, Surveillance, Investigation & Response (OSIR) Journal, vol. 13, no. 1, Mar. 2020, pp. 26-32, doi:10.59096/osir.v13i1.262853.