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sameeralord
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Does this mean if someone comes into contact with faecally contaminated matter of an immunised polio person, that person would also be vaccinated. Thanks 
The oral polio virus vaccine contains weakened strains of the polio virus. When ingested, it stimulates the body's immune system to produce antibodies against the virus, providing protection against future infections.
When a person receives the oral polio vaccine, the weakened virus replicates in the intestines and is shed in feces. This shedding allows the virus to spread to other individuals who come into contact with the feces, leading to immunity in the community.
No, the weakened virus in the vaccine is unable to cause polio infection in healthy individuals. However, individuals with weakened immune systems may be at risk of developing polio if they come into contact with the feces of someone who has recently received the vaccine.
Herd immunity is the indirect protection against a contagious disease that occurs when a large percentage of the population becomes immune to the disease. This makes it difficult for the disease to spread, protecting even those who are not immune. It is important for protecting vulnerable individuals who are unable to receive vaccinations.
The oral polio virus vaccine provides long-term immunity, with most individuals remaining protected for life. However, in some cases, a booster dose may be recommended to ensure continued protection.