“…In addition, parenteral administration of large numbers of killed organisms frequently results in adverse reactions such as local discomfort, redness, swelling, fever, headache, myalgia, and general malaise (1,21,73,145). More severe systemic manifestations such as anaphylactic shock, acute renal disease, appendicitis, and erythema nodosum, although rare, have also been observed (13,75,80,101). Oral killed vaccines against typhoid fever do not generally produce side effects but have been shown to induce only low levels of circulating and secretory antibodies and insignificant levels of protection against challenge (59).…”