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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.
The first cases of West Nile disease in the United States occurred in 1999 in New York. In the first three years only a small number of human cases were diagnosed, all in the Eastern or Southern U.S. (149 cases and 19 deaths, 1999–2001). In 2002, the disease exploded to most of the lower 48 states, causing 4,156 diagnosed cases of which 284 died.
Cumulative total of the entire country: 1,590 cases. (Current as of Aug 28, 2012). [1] U.S. West Nile virus (WNV) neuroinvasive disease incidence as of Sep 4, 2012. The West Nile virus quickly spread across the United States after the first reported cases in Queens, New York, in 1999. The virus is believed to have entered in an infected bird or ...
CNN: How common is West Nile? Wen: In the US this year, the CDC has documented 33 states that have had West Nile cases. In 2023, 47 states reported West Nile cases; in total, there were more than ...
Weaver said surveillance for West Nile tends to be limited to major metropolitan areas, so it’s often hard to tell how widespread the virus is across the country.
West Nile virus also killed more people across Sacramento, Yolo, Placer and El Dorado counties last year than any of the previous 10 years, data show. West Nile virus cases jumped nearly 1,000% in ...
The list is based on CIA World Factbook 2023 estimates, unless indicated otherwise. Many developing countries have far higher proportions of young people, and lower proportions of older people, than some developed countries, and thus may have much higher age-specific mortality rates while having lower crude mortality rates.
Overall, the CDC has received reports of 289 West Nile cases in 33 states for 2024; 195 of those cases have been neuroinvasive, in which the virus invades the brain and nervous system. This can ...