Hi Sir /Mam.
The remaining doses of IPV can be given at 9 & 11 months even though OPV is given at 6 & 10 weeks.
Now the IPV (Injectable Polio Vaccine) is being favored over OPV (Oral Polio Vaccine). The reason being OPV does not protect against all the strains of Polio viruses. OPV protects only against Type 1 & 3. IPV protects against Type 1,2&3.
I hope this clears your doubt.
Answered2016-12-16 05:32:01
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