A stepped-wedge cluster randomized trial of an electronic clinical decision support tool (eCDST) for the diagnosis and treatment of lower respiratory tract infection (LRTI) in southern Sri Lanka. A collaboration between Duke University, US and University of Ruhuna, Sri Lanka. Principal Investigators of the study are: Prof. Gayani Tillekeratne, MD MSc Duke University, Dr. Warsha De Zoysa, MBBS MD Faculty of Medicine, University of Ruhuna, Co-Investigators of the study are: Prof. Champica Bodinayake, MBBS MD Faculty of Medicine, University of Ruhuna, Prof. Gaya Wijayaratne, MBBS MD Faculty of Medicine, University of Ruhuna, Prof. Christopher Woods, MD MPH Duke University School of Medicine, Prof. Ajith Nagahawatte, Dr. Dammika Palangasinghe, Dr. Nayani Weerasinghe, Dr. Ruvini Kurukulasooriya, Prof. Susanna Naggie, MD MHS Duke University School of Medicine, Dr. Hrishikesh Chakraborty, Mr. Obale Obale, Dr. Bhagya Senadeera, Ms. Madureka Premamali, Ms. Jayani Gamage. Commenced in October 2023. Data collection and sample collection are still in progress.