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ActHIB Dosage

The ActHIB vaccine is typically given between the ages of two months and five years in a series of four injections. The standard dosage of ActHIB contains 0.5 mL of medication, and children who missed the last "booster" shot due to a recent shortage can now receive it at any time, up to five years of age.

An Introduction to Dosing With ActHIB

There is only one standard dosage for ActHIB® (Hib vaccine). However, the exact schedule and the number of doses necessary may vary, depending on the age of the child when the vaccination is first given.

Recommended ActHIB Vaccination Schedule

According to the prescribing information for ActHIB, the ideal, standard dosage is four doses (0.5 mL each, injected into the upper arm or thigh muscle) at 2, 4, 6, and 15 to 18 months of age. The Centers for Disease Control (CDC) recommends that the last ActHIB dose (the "booster" dose) be given at 12 to 15 months of age, not 15 to 18 months of age.
For a while, there was a shortage of Hib vaccines, including ActHIB, and the last dose (the "booster") was temporarily postponed for all children. As of June 2009, however, the shortage has been resolved and the booster is now recommended. Children who missed the booster due to the shortage can receive the ActHIB dosage at any time, up through five years of age.

Delayed ActHIB Vaccine Schedules

If your child is seven months or older when he or she received the first dose of ActHIB, the full four-dose series is not necessary. For children receiving the first dose at age 7 to 11 months, only three doses are recommended, with eight weeks between the first two doses and the last dose at 15 to 18 months of age. For children receiving the first dose at age 12 to 14 months, only two doses are needed, with two months between the doses.
For children age 15 months through 5 years that have never received this vaccine, only one dose is necessary.
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ActHIB Vaccine Information

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