Typhoid fever is a significant public health concern affecting millions globally, particularly in regions such as West Africa, Asia, and Latin America. Caused by the bacterium *Salmonella typhi*, this illness is primarily transmitted through contaminated food and water and poses serious health risks, especially in unsanitary environments. According to the World Health Organisation, approximately 11 to 20 million cases are reported annually.

The importance of early detection cannot be overstated, as timely intervention can prevent severe complications such as intestinal perforation. This article delineates the four phases of typhoid fever to enhance understanding of its symptoms and progression.

The incubation phase commences immediately upon exposure to *Salmonella typhi*. This stage typically lasts one to two weeks but can extend from three days to sixty days, depending on the individual's immune response and the dose of bacteria ingested. During this period, the bacteria proliferate within the intestines, gradually entering the bloodstream and lymphatic systems without overt symptoms. While individuals may experience mild fatigue or a general sense of malaise, these signs are often negligible, allowing daily activities to continue as normal. This asymptomatic phase sets the stage for subsequent developments, transitioning from a silent infection to an active disease.