Book Review: Malviya R, Sundram S. (Eds.). Blockchain for Healthcare 4.0: Technology, Challenges, and Applications (1st ed.). CRC Press; 2023. South Afr J Pub Health [Internet]. 2026 Mar. 20 [cited 2026 Apr. 17];8(3):e3808. Available from: https://samajournals.co.za/index.php/sajph/article/view/3808