Hello, I have gone through your query and understand your concern. Yes. You should look for some other doctor for 3rd polio oral drops. Because three or more spaced doses of OPV are required to generate adequate levels of seroconversion. The action of oral polio vaccine (OPV) is two-pronged. 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. OPV strains also produce a local immune response in the lining ( mucous membrane ) of the intestines - the primary site for poliovirus multiplication. The antibodies produced there inhibit the multiplication of subsequent infections of wild (naturally occurring) virus. This intestinal immune response to OPV is probably a reason why mass campaigns with OPV have been shown to stop person-to-person transmission of wild poliovirus. If there is any mass campaigns in your current place, you can administer the third dose there. Else look for some doctor and have polio drops. Hope this helps. Please write back for further queries. Wishing you good health.