"In our country majority of children are already immune to Hepatitis A without giving its vaccine tthem."Justify this state ment giving 3 reasons???????
This is because in India majority of children get exposed to hepatitis A virus in their early childhood. During childhood, the effect of the disease are mild and the child body synthesise antibodies against the virus which provide them immunity. As a result, these children don't need vaccination and become resistant to the disease permanently.