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Inactivated polio vaccine (IPV) is the only polio vaccine that has been given in the United States since 2000. It is given by shot in the arm or leg, depending on the person's age. Oral polio vaccine (OPV) is used in other countries. CDC recommends that children get four doses of polio vaccine.

Oral Polio Vaccine (OPV) – 0 dose This is the first dose taken at birth. The next dose is taken when your child is 6 weeks old, the third dose at 10 weeks old, and the last dose at 14 weeks old.

Bivalent type 1 & 3 oral poliomyelitis vaccine I.P. Each dose of 2 Drops (0.1 ml) contains Poliovirus (SABIN) P.M.K.C.C. Note: CCID50 is the statistically determined quantity of virus that infects 50% of the cell culture.

CDC recommends that children get four doses of polio vaccine. They should get one dose at each of the following ages: 2 months old, 4 months old, 6 through 18 months old, and 4 through 6 years old.

Dosing : Oral: 2 drops. OPV 0 is given at birth, followed by OPV1 at 6 months, OPV2 at 9 months and OPV3 at 4-6 years of age. OPV can be given for all the primary doses in cases where IPV is not possible.

OPV is usually provided in vials containing 10–20 doses of vaccine. A single dose of oral polio vaccine (usually two drops) contains 1,000,000 infectious units of Sabin 1 (effective against PV1), 100,000 infectious units of the Sabin 2 strain, and 600,000 infectious units of Sabin 3.

Oral polio vaccine (OPV) OPV produces antibodies in the blood ('humoral' or serum immunity) to all three types of poliovirus, and in the event of infection, this protects the individual against polio paralysis by preventing the spread of poliovirus to the nervous system.

Expert Answer : At the most there is a theoretical possibility that the the baby can develop loose stools which will be self- limiting as it is a viral diarrhoea due to gut invasion and gut proliferation of attunuated live Polio Viruses. But in practice nothing happens. The excesss drops become a wasted dose.