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How many doses of the vaccine for Hib (H. influenzae type b) are needed?

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Different Hib vaccines have been licensed for use in the U.S. The vaccines are equally effective, and one can be substituted for the other if the original vaccine the child received is not available. The number of doses that are required for full immunity -- either three or four -- depends on which vaccine is being used. For adults and older children who have a higher risk and have never been vaccinated, at least one dose of the vaccine is needed for protection.

From: Hib (H. influenzae Type B) Vaccine WebMD Medical Reference

SOURCES:

Pediatrics , published online Feb. 1, 2011.

Immunization Action Coalition: “Hib Vaccine Questions and Answers.”

The Children’s Hospital of Philadelphia Vaccine Information Center: “A Look at Each Vaccine: Hib Vaccine.”

CDC: "Is Your Baby Protected against Hib Disease?"

Reviewed by Renee A. Alli on September 08, 2018

SOURCES:

Pediatrics , published online Feb. 1, 2011.

Immunization Action Coalition: “Hib Vaccine Questions and Answers.”

The Children’s Hospital of Philadelphia Vaccine Information Center: “A Look at Each Vaccine: Hib Vaccine.”

CDC: "Is Your Baby Protected against Hib Disease?"

Reviewed by Renee A. Alli on September 08, 2018

NEXT QUESTION:

When should my child be vaccinated for Hib (H. influenzae type b)?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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