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[SITUATION] · [ACTIVE] · [HEALTH]

6 clusters · 45 sources · 22 days · First seen 23 days ago · Last updated 1 day ago

West Nile virus surge in North America and Europe

Overview

Public health agencies in the United States, Canada, and Europe continue to report significant West Nile virus activity. In the United States, the CDC has reported 222 human cases nationally, with concentrations in Arizona, Texas, and California. Arizona has recorded 143 cases and five deaths. In New York City, officials confirmed the first human case of 2026 involving brain swelling, while Los Angeles County reported its first death of the season due to neurological complications.

In Canada, Manitoba has reported four human cases, leading to increased mosquito fogging in high-risk areas such as West St. Paul. In Georgia, activity has been detected in DeKalb and Chatham counties.

European activity has expanded significantly. Italy remains heavily impacted, with the Istituto Superiore di Sanità confirming 312 cases and 13 deaths since the start of the year. Notably, 156 of these cases presented in neuro-invasive forms. The virus is circulating in 16 regions, including Lombardy and Campania, where Caserta has emerged as a regional epicenter.

Greece has emerged as the second most affected country in Europe, recording 157 cases and 13 deaths, with high activity in the Attica and Thessaly regions. In Thessaly, two deaths have been documented among elderly individuals. Additionally, North Macedonia has recorded 43 cases, with 40 laboratory-confirmed. In Skopje, health officials identified the virus in a dead crow and are monitoring high-risk areas such as canals and septic tanks.

Entities

Centers for Disease Control and Prevention · New York City Department of Health and Mental Hygiene · New York City Health Department · Colorado · South Carolina Department of Public Health

Claims

What the coverage asserts, and how many sources carry each claim.

[● 3 SOURCES] Italy has recorded 312 West Nile virus infections and 13 deaths. casertaweb.com · www.salutedomani.com · www.cremonaoggi.it
[● 3 SOURCES] In Italy, 156 cases of West Nile virus have manifested in neuro-invasive forms. casertaweb.com · www.salutedomani.com · www.cremonaoggi.it
[● 3 SOURCES] Greece is experiencing a significant surge in West Nile virus cases compared to previous years. ygeianet.gr · www.megatv.com · www.ygeiamasnews.gr
[● 3 SOURCES] Greece has recorded 157 West Nile virus cases and 13 deaths since the start of the year. www.megatv.com · www.thebest.gr · ygeianet.gr
[● 3 SOURCES] Between August 12 and August 19, 47 new cases and 4 deaths were reported in Greece. www.megatv.com · www.thebest.gr · ygeianet.gr
[● 2 SOURCES] Two human cases of West Nile virus were confirmed in the Salento region of Italy. www.corrieresalentino.it · www.lospecialegiornale.it
[● 2 SOURCES] Positive cases have been identified in horses in the municipalities of Lizzanello, Martano, and San Donato. www.corrieresalentino.it · www.lospecialegiornale.it
[● 2 SOURCES] North Macedonia has recorded 43 cases of West Nile fever, with 40 laboratory-confirmed. zurnal.mk · 360stepeni.mk
[● 2 SOURCES] The West Nile virus was confirmed in a dead crow in Skopje, North Macedonia. zurnal.mk · 360stepeni.mk
[● 2 SOURCES] The ECDC reports 98 affected areas across 12 European countries, with Italy and Greece having the highest counts. ygeianet.gr · www.gazetebirlik.com
[● 2 SOURCES] In Thessaly, 22 West Nile virus cases and two deaths of elderly individuals in Larissa and Karditsa have been recorded as of August 21. www.thebest.gr · www.larisanew.gr
[○ 1 SOURCE] In Campania, 22 infections have been confirmed, with 13 cases located in the Caserta province. casertaweb.com

Timeline

1 day ago

[HEALTH] 30 sources
West Nile virus cases surge across Europe and North America
West Nile virus cases are surging globally, with high infection and death rates reported in Italy, Greece, and North Macedonia, alongside new human cases and fatalities in the US and Canada.
4 days ago

[HEALTH] 7 sources
West Nile virus detected in Georgia mosquitoes and human case confirmed
West Nile virus activity is rising in Georgia, with seven positive mosquito traps in DeKalb County and a confirmed human case reported in Chatham County.
4 days ago

[HEALTH] 3 sources
New York City initiates mosquito spraying in Brooklyn due to West Nile virus
New York City is conducting targeted mosquito spraying in South Brooklyn to combat rising West Nile virus activity after surveillance identified numerous virus-positive mosquito pools.
7 days ago

[HEALTH] 5 sources
New York health officials increase mosquito surveillance amid rising West Nile virus activity
Health officials in New York report a sharp increase in West Nile virus activity in mosquito pools, prompting intensified surveillance and public health advisories to prevent mosquito-borne illnesses.
13 days ago

[HEALTH] 2 sources
US mosquito populations drop amid West Nile virus concerns
Mosquito populations in the Western and Midwest U.S. have dropped by up to 70% due to drought, yet experts warn of rising West Nile virus risks and high case numbers in states like Arizona.
23 days ago

[HEALTH] 10 sources
West Nile Virus Activity Surges in US and Canada in 2026
US and Canada see a surge in West Nile virus in 2026, with record mosquito positives in Utah and Orange County, human cases in Santa Clara, Galveston and Toronto, and positive mosquito pools in Niagara and Wes

Sources

100percentfedup.com · 360stepeni.mk · abc7ny.com · affaritaliani.it · anglophone-direct.com · atypon.com · bkreader.com · ca.sports.yahoo.com · casertaweb.com · cremonaoggi.it · dailythepatriot.com · diariolibre.com · durhampost.ca · ertnews.gr · fitsnews.com · fullertonobserver.com · gazetedamga.com.tr · gpg.portalnova.com · greekcitytimes.com · independent.co.uk · jewishpress.com · jobbing.fr · kvia.com · larisanew.gr · linkoristano.it · lykavitos.gr · mebpersonel.com · megatv.com · myfoxatlanta.com · mynewsla.com · newsday.com · oswegocountytoday.com · pliroforiodotis.gr · thebest.gr · thecooldown.com · thegeorgiasun.com · thestructure.co.uk · usa.inquirer.net · wbiw.com · winnipegfreepress.com · world-today-news.com · www2.iefimerida.gr · ygeianet.gr · ygeianews.gr · zurnal.mk

This summary has been updated 6 times: see revision history