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Haemophilus Influenzae Type B (Hib) Conjugate Vaccine

What Is Hib?

Haemophilus influenzae type b bacteria (Hib) were the leading cause of meningitis in children younger than five years old until the Hib vaccine became available.

Hib Immunization Schedule

The Hib vaccine is given by injection at ages:

2 months

4 months

6 months (however, some of the Hib vaccines don’t require a dose at six months)

A booster dose at 12–15 months

Kids aged 15 months or older who are receiving the vaccine for the first time only need one dose.

Children aged twelve months to fifty nine months (almost five years old) may need additional doses if their immune systems are weakened due to things like asplenia (when the spleen is missing or not working properly), HIV infection, chemotherapy or radiation treatment, or a stem cell transplant.

The vaccine isn’t routinely recommended for kids older than five, unless they have HIV or asplenia and have never been vaccinated.

Why Is the Hib Vaccine Recommended?

The vaccine provides long-term protection from Haemophilus influenzae type b. Those who are immunized have protection against Hib meningitis; pneumonia; pericarditis (an infection of the membrane covering the heart); and infections of the blood, bones, and joints caused by the bacteria.

Possible Risks of Hib Immunization

Minor issues — such as redness, swelling, or tenderness where the shot was given — can happen. There is a very small chance of an allergic reaction with any vaccine.

When to Delay or Avoid Hib Immunization

The vaccine is not recommended if your child:

Is currently sick, although simple colds or other minor illnesses should not prevent immunization

Had a severe allergic reaction (anaphylaxis) to a previous Hib vaccine

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