Why acute typhoid fever come again and again?

Acute typhoid fever can recur due to several factors, including reinfection with the Salmonella typhi bacteria, often through contaminated food or water. Individuals may also remain carriers of the bacteria after an initial infection, shedding it intermittently. Poor sanitation, lack of access to clean water, and inadequate vaccination can further exacerbate the problem, leading to repeated outbreaks in endemic areas. Additionally, antibiotic resistance can complicate treatment and prolong the duration of infection.