The immune response to viral infection comprises innate and adaptive defenses. The innate response, which we have discussed previously, functions continuously in a normal host without exposure to any virus. Most viral infections are controlled by the innate immune system.
The original Ku Klux Klan was organized by ex-Confederate elements to oppose the Reconstruction policies of the radical Republican Congress and to maintain white supremacy..
This second organization adopted a standard white costume and used similar code words as the first Klan, while adding cross burnings and mass parades. The third and current manifestation of the KKK emerged after 1950, in the form of small, local, unconnected groups that use the KKK name. They focused on opposition to the Civil Rights Movement, often using violence and murder to suppress activists.