Huda Ali4*Fadwa Hassan Omer Mohammed1*, Wafa Ibrahim Elhag2*,Hamza Abdallha3*,. “Association Between Helicobacter Pylori Infection and Increased Risk of Typhoid Fever in Khartoum- Sudan”. Journal of Biomedical and Pharmaceutical Research 4, no. 4 (October 30, 2017). Accessed May 2, 2024. http://jbpr.in/index.php/jbpr/article/view/218.