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West Nile fever is an infection by the West Nile virus, which is typically spread by mosquitoes. [1] In about 80% of infections people have few or no symptoms . [ 2 ] About 20% of people develop a fever , headache, vomiting, or a rash. [ 1 ]
Human infectious diseases may be characterized by their case fatality rate (CFR), the proportion of people diagnosed with a disease who die from it (cf. mortality rate).It should not be confused with the infection fatality rate (IFR), the estimated proportion of people infected by a disease-causing agent, including asymptomatic and undiagnosed infections, who die from the disease.
During the 2012 West Nile virus outbreak in Texas, 1,868 cases were reported. Male patients, persons >65 years of age, and minorities were at highest risk for neuroinvasive disease. At total of 1,868 cases including 844 (45%) WNND (West Nile neuroinvasive disease) cases and 89 deaths (case-fatality rate 5%).
CNN: What are the symptoms of West Nile virus disease and how serious is it? Dr. Leana Wen: West Nile virus is the No. 1 cause of mosquito-borne disease in the continental US, according to the US ...
Both West Nile virus and 'triple E,' which is eastern equine encephalitis, have had an uptick, particularly post-COVID," Dr. Larry Han, an assistant professor of public health and health sciences ...
Nationally, the incidence rate of neuroinvasive West Nile virus disease, meaning the infection affected the nervous system, was the highest since 2012 at 0.6 cases per 100,000 people, largely ...
West Nile virus (WNV) infection typically manifests with most individuals remaining asymptomatic, while approximately 20-40% of those infected develop symptoms ranging from mild flu-like illness to severe West Nile encephalitis. [9] The incidence of severe neurologic disease is less than 1%. [9]
Cases of West Nile virus, dengue, Oropouche virus and deadly Eastern equine encephalitis have all been reported in the U.S. this summer. Mosquito-borne illnesses are back in the news. 4 ways to ...