Health
West Nile virus cases detected across 32 states as CDC reports over 200 infections
Federal health authorities report 222 human cases of West Nile virus nationwide this year, with no human vaccine currently available.
The short version
- The Centers for Disease Control and Prevention reported 222 human West Nile virus cases across 32 states, led by Arizona, Texas, and California.
- New York City logged its first human case of the season, while infected mosquitoes were identified in every borough.
- Health experts emphasize personal prevention methods, such as repellents and removing standing water, because no human vaccine exists.
Key facts
- The CDC reported 222 human cases of West Nile virus across 32 states this year, with Arizona, Texas, and California recording the highest numbers.[Scientific American]
- New York City confirmed its first human West Nile infection of the year, and surveillance detected the virus in mosquitoes in all five boroughs.[Scientific American]
- Culex mosquitoes are the primary vector for West Nile virus in the United States, and there is no approved vaccine for humans.[Scientific American]
- While most infections are asymptomatic or result in mild flulike symptoms, rare cases can lead to severe neurological issues such as meningitis, encephalitis, and paralysis.[Scientific American]
What remains uncertain
- The true total number of human infections remains unknown because many cases are asymptomatic or present with mild symptoms that go undiagnosed.[Scientific American]
- New York City health officials noted that the individual confirmed with the city's first human case may have contracted the virus outside the city.[Scientific American]
Sources
- What you need to know about West Nile virusScientific American metered