West Nile Virus in Greece 2025: What Expats in Germany Should Know

Introduction

If you are an expat living in Germany and planning a summer trip to Greece or the broader Mediterranean region, a fast-moving health story deserves your attention. Greek authorities have recorded 157 cases of West Nile Virus so far in 2025, with the number quadrupling since late July alone. Thirteen people have died. The virus is spreading across Southern Europe, and while Germany is not currently an epicentre, the risk is real for anyone travelling to affected areas. Understanding what West Nile Virus is, how it spreads, and what precautions you should take can make the difference between a safe holiday and a serious health crisis.

What Is West Nile Virus and How Does It Spread?

West Nile Virus (WNV) is a mosquito-borne illness caused by a flavivirus. It is primarily transmitted to humans through the bite of an infected Culex mosquito, which typically picks up the virus by feeding on infected birds. The disease cannot be passed directly from person to person.

Most people infected with WNV — around 80 percent — experience no symptoms at all. Of those who do fall ill, the most common signs are:

• Fever, headache, and body aches
• Skin rash and swollen lymph nodes
• Fatigue that can last weeks

In a small number of cases (roughly 1 in 150 infections), the virus crosses into the nervous system, causing encephalitis (brain inflammation) or meningitis. This severe form is more likely in older adults and people with weakened immune systems, and it can be fatal.

There is currently no approved vaccine for humans and no specific antiviral treatment. Medical care is supportive — managing symptoms while the body fights the infection.

The 2025 Outbreak: Numbers and Geography

Greece is the hardest-hit country in Europe this season. The Hellenic Centre for Disease Control and Prevention has confirmed:

• 157 cases reported since the beginning of 2025
• The case count has quadrupled since late July, suggesting the outbreak is in full swing during the peak mosquito season
• 13 deaths recorded so far

Outbreaks of varying severity have also been reported in other parts of Southern and Central Europe in recent years, including Italy, Romania, and the Balkans. Germany's Robert Koch Institut (RKI) monitors WNV domestically; the virus has been detected in German bird and mosquito populations, and a small number of locally acquired human cases have occurred in Germany in previous years — primarily in the east and north-east. However, the current outbreak is concentrated in the Mediterranean.

What This Means for Expats in Germany

For most expats going about daily life in Germany, the immediate risk is low. The concern is highest for those who:

• Are travelling to Greece, Italy, the Balkans, or other parts of Southern Europe during the summer months (July–September)
• Have elderly relatives or immunocompromised family members joining them on trips to affected regions
• Are originally from affected regions and are visiting family this summer

Germany's statutory health insurance (Krankenversicherung) covers medical treatment if you fall ill while in another EU country — your European Health Insurance Card (EHIC), available through your insurer, provides access to state healthcare in Greece and other EU states. However, it does not cover repatriation or private medical facilities, so additional travel insurance is strongly recommended.

How to Protect Yourself

Since there is no vaccine, prevention is the only effective tool. Follow these steps if you are travelling to affected areas:

1. Use insect repellent containing DEET, Icaridin, or IR3535 on exposed skin, especially during dawn and dusk when Culex mosquitoes are most active.
2. Wear long sleeves and trousers in the evenings.
3. Sleep in air-conditioned rooms or use mosquito nets if windows are open.
4. Drain standing water around your accommodation (flowerpots, buckets) where mosquitoes breed.
5. See a doctor promptly if you develop fever, severe headache, or neck stiffness within 14 days of returning from an affected region. Tell the doctor where you travelled.

If you feel unwell after returning to Germany, your GP (Hausarzt) is the first point of contact. For urgent symptoms suggesting neurological involvement, go to the nearest hospital emergency department.

Frequently Asked Questions

Is West Nile Virus present in Germany itself?

Yes, in limited form. The RKI has documented the presence of WNV in German bird populations and some mosquito species, particularly in eastern Germany. A small number of locally acquired human cases have been confirmed in Germany in previous summers. The current 2025 alert, however, is focused on Southern Europe, particularly Greece. Travellers returning from those regions are at higher risk than people staying in Germany.

Does my German Krankenversicherung cover treatment abroad?

If you have public health insurance in Germany, your EHIC card entitles you to treatment in the public healthcare system of any EU country, including Greece. However, this card does not cover medical repatriation back to Germany or treatment in private clinics. Travel insurance that includes medical evacuation cover is strongly advisable for any trip to an affected region, particularly for older travellers or those with pre-existing conditions.

When should I see a doctor after returning from a trip?

If you develop fever, headaches, muscle weakness, or any neurological symptoms such as confusion, stiff neck, or sensitivity to light within 14 days of returning from a region with active WNV transmission, contact a doctor and mention your travel history. Early medical assessment is key to managing severe cases.

Conclusion and Next Steps

The West Nile Virus outbreak in Greece is a timely reminder that summer travel in Southern Europe carries health risks that go beyond sunburn and stomach bugs. With 157 cases and 13 deaths already recorded in 2025 — and numbers rising fast — expats in Germany planning Mediterranean holidays should take mosquito prevention seriously.

Check the latest travel health advisories from the Auswärtiges Amt (German Foreign Office) at auswaertiges-amt.de and the European Centre for Disease Prevention and Control (ECDC) at ecdc.europa.eu before you travel. Speak to your GP if you have concerns about your personal risk level.

Source: Tagesschau