What role did President Johnson play in U. S. involvement in the Vietnam War? * He led the protest movement against the Vietnam War.
He sent U. S. military advisors to Vietnam.
He gradually decreased U. S. involvement in the Vietnam War.
He was the first U. S. President to send troops to Vietnam and increased U. S. involvement in the Vietnam War.

An example of a political opponent would be albert einstein hitler hated him because he was jewish a pacifist

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.