The main differences between the oral typhoid vaccine and the injectable typhoid vaccine are their forms, administration methods, and duration of protection. The oral vaccine comes in the form of capsules containing live attenuated (weakened) bacteria, taken over a series of four doses. It stimulates immunity through the digestive system and typically provides protection for up to five years. The injectable typhoid vaccine, on the other hand, is administered as a single intramuscular injection containing inactivated (killed) bacteria. It usually provides protection for about two years. Both vaccines are effective, but the choice between them may depend on personal preference, medical history, and travel plans. It’s best to consult with a healthcare provider to determine which vaccine is most suitable for you.