Question: how many doses of polio vaccine are required?
Answer: Polio vaccination It's given by injection in 5 separate doses. These are normally given at: 8, 12 and 16 weeks of age – as part of the 6-in-1 vaccine. 3 years and 4 months of age – as part of the 4-in-1 (DTaP/IPV) pre-school booster.