The oral vaccine actually provides better immunity against the virus as it delivers intestinal immunity. It is the method of choice here as there are so many people travelling to and from countries where the disease is still imminent. We get it as an injection back home as the risk of Polio being contracted is much lower. Oral used to be recommended method as it is also well tolerated and treated many forms of infection but it has a small risk of paralysis.

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"Diplomacy is the art of saying 'Nice doggie' until you can find a rock - Will Rogers"