Nozomi, A.Z., Wisnuwardani, R.W. and Pakki, I.B. 2025. Relationship between Knowledge about Meningitis and Timeliness of Vaccination in Umrah Pilgrims. An Idea Health Journal. 5, 02 (Mar. 2025), 158–162. DOI:https://doi.org/10.53690/ihj.v5i02.453.