Bornavirus in Germany and Europe: How Dangerous Is It for Children?

This blog only provides tips, tricks and hints and does not replace a doctor visit. For severe symptoms, always consult a doctor.

In spring 2026, the headlines were back: people in Bavaria had died from a Bornavirus infection. "Rare, but almost always fatal" – those headlines stick, especially when you have young children. You may be wondering right now: do I need to worry about my child?

Here's the honest answer up front: Borna disease virus (BoDV-1) is extremely rare. Across all of Germany, only about five to ten cases are recorded per year – and preschool-age children appear to have been spared so far. At the same time, when the illness does occur, it is very serious. Both things are true. That's exactly why a calm, factual look is more useful than panic.

This article explains how dangerous the virus really is, where it occurs in Germany and Europe – and the few simple things that protect your family.

Important note: This article does not replace professional medical advice. If in doubt or in an emergency, contact a doctor or call the Europe-wide emergency number 112.

How Dangerous Is Bornavirus for Children, Really?

For any individual child, the risk is very low. Across Germany, only about five to ten people of all ages fall ill each year, and preschool children appear to have been spared so far. But if the virus does trigger encephalitis (brain inflammation), it is fatal in more than 90% of cases. Rare doesn't mean harmless – but the chance of being affected at all is tiny.

With a serious condition like this, it helps to hold two facts at once: the disease is exceptionally rare – and it is severe when it occurs. Headlines understandably emphasise the severity. For your day-to-day life, what matters most is the rarity.

Since March 2020, BoDV-1 disease has been notifiable in Germany. That's a big reason the cases feel more "visible" today than before – they are now actively tested for. In total, only a few dozen confirmed cases are known across recent decades.

What Is Bornavirus – and How Would You Even Recognise It?

Borna disease virus (BoDV-1) has long caused "Borna disease" in horses and sheep. Only in 2018 was it first confirmed as a cause of severe brain inflammation in humans. The first symptoms are entirely non-specific – fever, headache, fatigue – and indistinguishable from an ordinary infection.

This is the key point for parents: there is no early warning sign that would let you spot Bornavirus specifically. The initial symptoms look like thousands of harmless colds and stomach bugs. Suspecting Bornavirus in every feverish child would be neither sensible nor helpful. The real lever, therefore, isn't watching symptoms – it's prevention (more on that below).

In the rare event of illness, the non-specific start is followed within days to weeks by neurological symptoms: confusion, behavioural changes, speech and gait problems, seizures, and a progressive decline in consciousness.

Regardless of the cause: sudden severe neurological symptoms always need immediate medical assessment – for example a stiff neck, a seizure, persistent confusion, or a child who is very hard to wake. Such signs are rare and almost never Bornavirus, but in every case they need emergency care – go to hospital or call 112.

Because the early signs are no different from an ordinary infection, the most useful thing you can do is record the course of any illness: when the fever started, how your child is behaving, what is changing. That way, if anything genuinely worsens, you can give the doctor a clear picture quickly.

The pediatrician asks. You can answer.

Symptom timeline, fever curve, last medication: With Mona you have it all in seconds, instead of guessing from memory.

App Store Play Store

Where Does Bornavirus Occur in Germany and Europe?

Bornavirus appears only in clearly defined endemic regions. The focus is the eastern part of southern Germany: large parts of Bavaria, plus parts of Baden-Württemberg, Thuringia, Saxony, Saxony-Anhalt and Brandenburg. Outside these regions, no disease risk is currently known. If your family lives elsewhere, the question is essentially settled.

There are smaller known occurrences in neighbouring countries. Experts also see no clear expansion trend over recent decades – the virus is not "spreading" across Europe.

Region	Bornavirus occurrence
Bavaria + parts of Baden-Württemberg, Thuringia, Saxony, Saxony-Anhalt, Brandenburg	Main distribution area (endemic region)
Switzerland (Graubünden, St. Gallen), Liechtenstein, Austria (Vorarlberg, Upper Austria)	Smaller known occurrences
Rest of Germany and Europe	No known disease risk

How Is Bornavirus Transmitted?

The natural host is the bicoloured white-toothed shrew (Crocidura leucodon). It carries the virus for life without becoming ill itself and sheds it via urine, droppings and saliva. Humans become infected only rarely and by chance – probably through contact with these excretions or contaminated material, perhaps via small skin wounds or inhaled dust. The exact route is still being researched.

Two points are especially reassuring for parents. First: Bornavirus is not transmissible from person to person. Your child cannot catch it from a sick person (the only ever documented exception was transmission through an organ transplant).

Second: pets and horses do not pass the virus on. Cats, dogs, horses and sheep can fall ill themselves, but they are "dead-end hosts" – they do not shed the virus in an infectious form. A sick horse or the family cat is therefore not a source of infection for your child.

Good to know: infection happens essentially only through contact with shrew excretions – not through coughing, handshakes, playgrounds, swimming pools or the family dog.

How Can I Protect My Family?

Because there is no vaccine and no specific treatment, prevention is the decisive lever – and it's reassuringly simple. At its core, it's about avoiding contact with shrews and their excretions, especially in the endemic regions. This doesn't require daily worry; a few habits are enough.

Simple protective measures (above all in endemic regions):

Never touch dead or sick small mammals – especially shrews – with bare hands. Use disposable gloves.
Before disposal, dampen a dead animal with household cleaner so no virus-laden dust is stirred up, and dispose of it in a sealable bag.
Clean sheds, cellars or garden houses with mouse droppings using a damp cloth – never sweep dry; with heavy soiling, also wear an FFP2 mask and gloves.
After gardening and cleaning, wash your hands; after dusty work, change clothes and shower.
Avoid food sources that attract shrews – open compost, pet food left outdoors.
If the cat brings home a dead mouse, dispose of it with gloves and don't let your child handle it.

Teaching children not to touch dead animals at all is a good rule anyway – it protects not only against Bornavirus but against other pathogens too. If you live outside the endemic regions, you can treat these points as general hygiene; the actual risk there is vanishingly small.

Frequently Asked Questions About Bornavirus in Children

Can children catch Bornavirus while playing in the garden?

The risk is very low. Infection is essentially only possible through contact with the excretions of an infected shrew, and only in the endemic regions. Simple care is enough: don't let children touch dead animals, and wash hands after playing. Ordinary play in the garden is no cause for concern.

Is Bornavirus contagious from person to person?

No. According to current knowledge, BoDV-1 is not transmissible from person to person. Your child cannot catch it from a sick person – not at nursery or school either. The only ever documented exception was transmission via an organ transplant, which is not an everyday route.

Can my child catch it from pets or horses?

No. Cats, dogs, horses and sheep are so-called dead-end hosts. They can fall ill with a Bornavirus infection themselves, but they do not shed the virus in an infectious form. A sick horse or the family cat is therefore not a source of infection for your child.

Is there a vaccine or treatment for Bornavirus?

There is no generally available vaccine against BoDV-1 for humans, and no established, reliably effective treatment exists so far. That is exactly why prevention takes priority: avoid contact with shrews and their excretions – above all in the known endemic regions.

How can I tell whether my child has Bornavirus?

You cannot detect it early: the first signs, such as fever and headache, are non-specific and resemble any harmless infection. Almost always, something trivial is behind them. Sudden severe neurological symptoms – such as seizures, a stiff neck or marked confusion – need immediate medical assessment regardless of the cause.

Is Bornavirus spreading across Europe?

Experts see no clear expansion trend over recent decades. The fact that more cases are noticed today is mainly due to mandatory reporting since 2020 and better diagnostics – not necessarily more illness. The known distribution areas have remained largely stable over time.

Summary: How Worried Should I Be?

In short: attentive, but relaxed. For the vast majority of families, Bornavirus is not a relevant everyday risk. The following overview helps you judge the situation for your circumstances.

Situation	What it means
You live outside the endemic regions	Practically no risk
Everyday life in an endemic region	Very low risk – simple care is enough
Dead shrew in the garden, or a shed with mouse droppings	Gloves, dampen, clean wet, dispose safely
Child under 6 years	Preschool children appear to be spared (regarded as a protected age group)
Sudden severe neurological symptoms (any cause)	Seek medical care immediately – hospital or 112

Bornavirus is a good example of how "rare" and "serious" can go together – without that becoming a reason to panic. With a few simple habits and a calm head, your family is well prepared.