West Nile Virus Cases Confirmed in Italy's Lazio Region

Since the beginning of 2025, three European countries have reported human cases of West Nile virus infections: Greece, Romania, and Italy.

According to Italy's National Institute of Health, 10 confirmed human cases of West Nile virus have been reported since the beginning of 2025.

As of July 20, 2025, seven of these mosquito-transmitted cases had been reported from the Lazio region, specifically from Latina, Italy's second most populous region, with over 5 million residents.

Throughout 2024, twenty WNV-related deaths were recorded in Italy.

In the United States, 1,466 WVN cases were reported in 2024, with over 1,000 cases involving the nervous system. Most WNV cases are reported in the southwest states.

As of July 24, 2025, WNV vaccine candidates continue to be tested in clinical research for prevention purposes. However, none have been approved for use in humans.