A closely related virus, Kunjin virus, is present in Australia. Symptoms, if any, vary in severity but may include fever, headache, body aches, joint pain, vomiting, diarrhea, or rash. [msdmanuals.com]

• Fatigue

  Most people with this type of West Nile virus disease recover completely, but fatigue and weakness can last for weeks or months. Serious symptoms in a few people. [cdc.gov]

  Most people with typical symptoms recover completely, but fatigue and weakness can last for weeks or months. People whose central nervous system was affected often have long-lasting adverse effects on their brain and nerves. [msdmanuals.com]

• Weakness

  Most people with this type of West Nile virus disease recover completely, but fatigue and weakness can last for weeks or months. Serious symptoms in a few people. [cdc.gov]

  Symptoms of central nervous system infection include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, seizures, muscle weakness, vision loss, numbness, and paralysis. [msdmanuals.com]

• Falling

  Cases of WNV occur during mosquito season, which starts in the summer and continues through fall. There are no vaccines to prevent or medications to treat WNV in people. Fortunately, most people infected with WNV do not feel sick. [cdc.gov]

• Headache

  About 1 in 5 people who are infected develop a fever with other symptoms such as headache, body aches, joint pains, vomiting, diarrhea, or rash. [cdc.gov]

  About 1 in 5 develop fever along with other symptoms such as headache, body aches, joint pain, vomiting, diarrhea, or rash. [msdmanuals.com]

• Stupor

  Symptoms of severe illness include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness and paralysis. [cdc.gov]

  Symptoms of central nervous system infection include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, seizures, muscle weakness, vision loss, numbness, and paralysis. [msdmanuals.com]

Treatment No vaccine or specific antiviral treatments for West Nile virus infection are available. [cdc.gov]

Supportive care There is no specific treatment for West Nile virus infection. Treatment of West Nile virus infection is supportive. [msdmanuals.com]

& Gubler D.J. (2006): West Nile virus: epidemiology and clinical features of an emerging epidemic in the United States. Annu. Rev. Med. 57:181–194. Hayes E.B. et al. (2005): Epidemiology and transmission dynamics of West Nile virus disease. [ages.at]

There are no vaccines to prevent West Nile virus infection in humans, but people can reduce the risk of transmission by taking steps to prevent mosquito bites. [msdmanuals.com]

You can reduce your risk of WNV by using insect repellent and wearing long-sleeved shirts and long pants to prevent mosquito bites. [cdc.gov]