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9 Things to Know About Childhood Immunizations

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3. Childhood Vaccinations Often Require Booster Shots

For two-year-olds, doctors recommend: four doses of diphtheria, tetanus and pertussis vaccine (DTaP); three to four doses of Hib vaccine; four doses of pneumococcal vaccine; three doses of polio vaccine; two doses of hepatitis A vaccine; three doses of hepatitis B vaccine; one dose of measles, mumps and rubella vaccine (MMR); three doses of rotavirus vaccine; one dose of varicella vaccine; and two to three doses of influenza vaccine (6 months and older). These vaccinations can usually be completed over the course of five doctor visits.