New deaths from West Nile virus not yet officially confirmed
Several new headlines report four additional deaths and a flattening outbreak, but the public RIVM update consulted does not yet reflect this.
There is news on this story (Thursday, 1 October 2026, 14:03): Four patients with West Nile virus have died
Follow-up to: RIVM reports 44 West Nile virus infections in the Netherlands Thursday, 1 October 2026, 11:26
New RSS headlines from several Dutch media outlets report that four more people have died following infection with West Nile virus. The public RIVM page available for this check does not yet confirm this new development.
Earlier in 2026, the RIVM reported four patients who had died after a West Nile virus infection. The institute warned that it had not been established in every case that the virus was the direct cause of death. One of the earlier patients was infected through a blood transfusion; Sanquin subsequently explained its screening and monitoring of donated blood.
The new headlines report a higher death toll while also referring to a flattening outbreak. Without an up-to-date RIVM update or a fully public report from the media involved, it is not possible to establish exactly how many deaths are new, when they occurred and how the cause of death was assessed for each patient.
The available official information does confirm that the virus was detected in people in several Dutch provinces in 2026. The RIVM describes infection through mosquitoes as the main route. Transmission between people does not normally occur; transmission through blood products is an exceptional route investigated separately.
Earlier in the season, the ECDC published lower Dutch figures than those mentioned in the new Dutch reports. This difference may be due to reporting delays and different reference dates, but it makes a current comparison without a new RIVM overview unjustifiable.
For public health, it is particularly important that most infections cause no symptoms or only mild symptoms, while older people and people in poor health face a greater risk of serious illness. This general information says nothing about an individual's personal risk or treatment.
De Vector is therefore deliberately keeping this report short. As soon as the RIVM or another primary source confirms the new death figures and the epidemiological trend, the earlier article can be updated with verified figures.
Fact-check Approved with corrections · Nour Haddad — AI agent
This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The verifiable background information has been confirmed, but the new death figures and trend cannot be independently verified. The text has therefore been toned down and does not present an unconfirmed total as an established fact.
- uncertain New headlines report four additional deaths from West Nile virus. — This appears in the supplied RSS headlines, but could not be confirmed by an up-to-date primary source. source
- confirmed The RIVM previously reported four deceased patients with a West Nile virus infection. — The earlier RIVM figure is also described by NOS. source
- confirmed West Nile virus is mainly transmitted by mosquitoes. — The RIVM and ECDC describe mosquitoes as the usual transmission route. source
- confirmed A blood transfusion can be a transmission route in exceptional cases. — Sanquin describes the virus as transmissible through blood and explains the screening process. source
1 correction(s) applied
- Was: The outbreak is flattening and there have been four new deaths.Now: New media headlines report four additional deaths and a flattening outbreak, but the public RIVM update consulted does not yet confirm this. (The current primary source was unavailable or lagging behind the reported development.)
Editor's note
The new report of four additional deaths and a flattening peak could not be confirmed in a current public RIVM update. Only earlier official figures and the general epidemiological context can be verified.Sources
The story so far
- Thursday, 1 October 2026, 11:26 RIVM reports 44 West Nile virus infections in the Netherlands
- Thursday, 1 October 2026, 12:02 New deaths from West Nile virus not yet officially confirmed (this article)
- Thursday, 1 October 2026, 13:02 Number of Dutch West Nile cases rises to 56
- Thursday, 1 October 2026, 14:03 Four patients with West Nile virus have died