What are potential adverse effects of Ty21a vaccine used in the prevention of typhoid fever (enteric fever)?

Updated: Aug 19, 2019
  • Author: John L Brusch, MD, FACP; Chief Editor: Michael Stuart Bronze, MD  more...
  • Print

Adverse effects are rare. They include abdominal discomfort, nausea, vomiting, fever, headache, and rash or urticaria.

The vaccine manufacturer of Ty21a recommends against use in children younger than 6 years. It should not be administered to immunocompromised persons; the parenteral vaccines present theoretically safer alternatives for this group.

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!