Which of the following is NOT a human disease vectored by ticks?

West Nile Virus is primarily transmitted by mosquitoes, not ticks. This disease is mainly linked to the bite of infected mosquitoes and does not involve ticks in its transmission cycle. In contrast, the other options—Rocky Mountain spotted fever, Lyme disease, and tularemia—are all diseases for which ticks are recognized as the vectors. Rocky Mountain spotted fever is spread by the bite of infected ticks, particularly the American dog tick. Lyme disease, caused by the bacterium Borrelia burgdorferi, is transmitted through the bite of infected black-legged ticks. Tularemia can also be transmitted by several species of ticks, among other routes. Therefore, identifying West Nile Virus as not being vectored by ticks is accurate, illustrating the importance of recognizing the specific vectors associated with different diseases.