Name a common disease transmitted by mosquitoes.

West Nile Virus is a well-documented disease that is primarily transmitted to humans through the bites of infected mosquitoes. This virus is part of the larger family of viruses known as flaviviruses, and it can lead to serious neurological conditions in some cases, making it a significant public health concern. The ecological role of mosquitoes as vectors for this virus underscores the importance of mosquito control in public health initiatives.

Other diseases listed, such as the flu, measles, and chickenpox, are not transmitted by mosquitoes. The flu is caused by influenza viruses and spreads primarily through respiratory droplets; measles is a viral infection that spreads through respiratory contact; and chickenpox is also a viral infection that spreads primarily through direct contact with an infected person or respiratory droplets. Therefore, while those diseases are important to public health, they do not relate to mosquito transmission, reinforcing that West Nile Virus is the correct answer in this context.