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. 2017 Aug 25;66(2):1–20. doi: 10.15585/mmwr.rr6602a1

This figure shows the influenza dosing algorithm for health care providers to use to determine the appropriate dose of vaccine for children aged 6 months through 8 years, as recommended by the Advisory Committee on Immunization Practices for the 2017–18 influenza season in the United States. Health care providers should ask if the child received two or more total doses of trivalent or quadrivalent influenza vaccine before July 1, 2017. (Doses need not have been received during the same season or consecutive seasons.) If the answer is “yes,” then the child should receive one dose of the 2017–18 influenza vaccine. If the answer is “no” or “don’t know,” then the child should receive two doses of the 2017–18 influenza vaccine (administered four or more weeks apart).

FIGURE. Influenza vaccine dosing algorithm for children aged 6 months through 8 years — Advisory Committee on Immunization Practices, United States, 2017–18 influenza season

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