This research aims to identify the etiology and epidemiology of emerging infectious diseases in southern Sri Lanka. Data collection commenced in July 2025 at the National Hospital, Galle, and will expand to other public hospitals in the future.  (PIs- Prof. Champica K Bodinayake, Prof. Ajith De Silva Nagahawatte, Prof. L Gayani Tillekeratne, Prof. Christopher W Woods, Dr. Subodha S. Wickramasinghe, Dr. H Harshani P M J Thabrew, Dr. Nayani P Weerasinghe, Dr.K.D.Dulnie Wijeweera, Dr. C Lakmal Fonseka, Dr. Warsha D de Zoysa, Dr. Dhammika R Palangasinghe, Dept. of Community, Prof. P Vijitha de Silva, Prof. C J Wijesinghe, Dr. Janaka Godevithana, Dr. M Ruvini P Kurukulasooriya, Ms. M H Madureka Premamali, Mr. U H Buddhika Y Dilshan, Ms. Senali Weerasinghe, Ms. Jayani Gamage, Dr. D L Bhagya Piyasiri, Prof. Truls Ostbye, Dr. Bradly P Nicholson)