IPV Routine vaccination

• 4-dose series at ages 2, 4, 6–18 months, 4–6 years; administer the final dose on or after age 4 years and at least 6 months after the previous dose.

• 4 or more doses of IPV can be administered before age 4 years when a combination vaccine containing IPV is used. However, a dose is still recommended on or after age 4 years and at least 6 months after the previous dose.

IPV Catch-up vaccination

• In the first 6 months of life, use minimum ages and intervals only for travel to a polio-endemic region or during an outbreak.

IPV Special situations

• Adolescents aged 18 years at increased risk of exposure to poliovirus with:
  -No evidence of a complete polio vaccination series (i.e., at least 3 doses): administer remaining doses (1, 2, or 3 doses) to complete a 3-dose series
  -Evidence of completed polio vaccination series (i.e., at least 3 doses): may administer one lifetime IPV booster