The under-6-months rule: why every European parent's first mosquito decision is a physical net, not a repellent

The European mosquito season now runs nine months of the year along the Mediterranean and is moving north faster than seasonal folklore suggests. Across the DACH region, France and Italy, Aedes albopictus - the Asian tiger mosquito - has moved from a curiosity of the Mediterranean coast to a fixture in suburban gardens, on terraces, and inside the houses that open onto them. For parents of newborns and young infants, the question is no longer whether mosquitoes will show up in the baby's room. They will. The question is what to do about it.

The answer for any infant under six months is simpler and stricter than the popular literature suggests. There is exactly one universally agreed recommendation from paediatric bodies across Europe and North America: do not apply repellent to the skin of an infant under six months. Physical barriers - primarily an untreated mosquito net over the crib, pram or playpen - are the only universally agreed protective measure for that age group.

This piece is the canonical reference for the under-six-months mosquito decision across the four markets where Mosticare publishes (France, Germany, Austria and Switzerland, Italy, and English-speaking Europe). It is intended to be the article other baby and nursery pages defer to. If you are short on time, read the five rules at the start of section 2. If you want the regulator language, section 3 sets it out by country. If you want the practical setup, section 5 is the long version of what an infant-safe mosquito night actually looks like.

What every European parent needs to know in five rules

1. No skin-applied repellent on infants under six months. This includes DEET, picaridin (icaridin), IR3535, oil of lemon eucalyptus (also called PMD or p-menthane-3,8-diol), and citronella-based products. The same exclusion usually extends to two years for oil of lemon eucalyptus, and to twelve years for products containing lemon eucalyptus oil at higher concentrations.
2. The single universally agreed alternative is a physical barrier. An untreated mosquito net over the crib is the canonical option. Long-sleeved clothing, socks and full-length pyjamas work the rest of the time.
3. Permethrin-treated nets exist, and they are not for your baby's crib. Insecticide-treated nets are a global health tool for malaria-endemic regions. They are regulated under the EU Biocidal Products Regulation (BPR), and WHO prequalification applies to them only. They are not the recommended option for routine infant protection in non-endemic European homes. Treating a baby canopy with permethrin changes its regulatory class, its safety profile, and its appropriate-use population.
4. A mosquito net for an infant must be untreated, breathable, and correctly fitted. The mesh size matters less than the tucking. The door of the net must be closed and re-closed every time.
5. Mosquito control around the home is part of infant protection. Standing water in trays, gutters, plant saucers and toys is a breeding site within a hundred metres of the bedroom window. The protection around the crib is half the picture. Source reduction is the other half.

Why "zero chemical" is the regulatory floor, not a preference

There is a tendency, particularly in marketing copy aimed at new parents, to treat the avoidance of skin-applied repellents for under-six-months as a lifestyle preference - "chemical-free", "natural", "pure". The avoidance is not a preference. It is the consistent position of every major paediatric and regulatory body that has published on the topic.

The United States Centers for Disease Control and Prevention (CDC) and the American Academy of Pediatrics (AAP) are the most commonly cited sources. Their position, repeated in the AAP's Handbook of Pediatric Environmental Health and in CDC's yellow-book travel chapter, is that DEET, picaridin and IR3535 are not recommended for use on infants younger than two months; oil of lemon eucalyptus is excluded for children under three years; and the protective alternative for the under-six-months cohort is a mosquito net over the carrier, crib or stroller.

The European equivalent is structurally the same, though the regulator names differ by country. France's Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES), Germany's Bundesinstitut für Risikobewertung (BfR), Austria's Agentur für Gesundheit und Ernährungssicherheit (AGES), and Italy's Istituto Superiore di Sanità (ISS) all align with this position. They differ on the precise wording of the lower age limit and on individual active ingredients; none of them recommends skin-applied repellent as the primary protection for an infant under six months. The Italian guidance, published by ISS as part of its Zanzare e salute pubblica materials and updated for the 2025 season, is explicit that for infants under six months the recommended protection is a mosquito net over the crib, with no repellent applied to skin.

The European Chemicals Agency (ECHA) and the EU Biocidal Products Regulation (BPR, Regulation (EU) 528/2012) provide the regulatory frame that surrounds this advice. Repellent active ingredients - DEET, picaridin, IR3535, PMD - are biocidal products under BPR. Authorised products carry a label that specifies the populations they may be used on, the maximum concentration, and the age exclusions. A parent reading a repellent label will find, in the small print, that most products are excluded from use on infants under six months (DEET) or two months (picaridin, IR3535 in many labelled products); oil of lemon eucalyptus products are excluded for children under three.

It is the label that does the work. When the label says "not suitable for children under X", that exclusion is a regulatory condition of use, not a marketing recommendation. Disregarding it puts the product outside its authorised use, and changes its legal status for that application. The practical translation, for a parent of an infant under six months, is that the repellent is not an option at all - at any concentration, in any formulation, on any brand.

What each active ingredient actually says, on its own label

The four repellent active ingredients most commonly sold to European consumers are not interchangeable on the age axis. Parents who treat "repellent" as a single category and swap freely between products are accidentally purchasing across different age restrictions.

DEET is the longest-established insect repellent active ingredient. Its labelling under ECHA/BPR review has consistently excluded use on infants under two months for products applied to skin, and has set a maximum concentration (commonly 30% in consumer products, lower for children). The label of any DEET product in the EU will state the age exclusion in the user-instructions block.

Picaridin (also called icaridin) is widely sold across Germany and Austria as the DEET alternative. Its age exclusion is similar - most labelled products exclude infants under six months, with the lower bound at two months for some formulations. Concentration is typically 20% in consumer products.

IR3535 is the third major synthetic repellent in European consumer use. It is sold in concentrations up to 20% in repellent lotions and sprays. Labelling exclusions for under-six-months or under-two-months apply to most formulations.

Oil of lemon eucalyptus (also called PMD, p-menthane-3,8-diol, or Eucalyptus citriodora oil) is a plant-derived active ingredient. The AAP exclusion for oil of lemon eucalyptus is stricter than the synthetic repellents - children under three years of age. There is no formulation of oil of lemon eucalyptus repellent that is authorised for use on an infant under three. A parent who switches from DEET or picaridin to a "natural" lemon eucalyptus product for a younger baby is moving to a more restrictive exclusion, not a less restrictive one.

The simplest reading is the correct one: there is no skin-applied repellent authorised for an infant under six months. There is no skin-applied repellent authorised for an infant under three years that contains oil of lemon eucalyptus. The alternatives are non-skin - physical barriers and source reduction - not "natural alternatives" applied to skin.

The physical net alternative, in detail

The physical barrier for an infant under six months is not a single product. There are three structurally different options: a crib canopy, a stroller or pram net, and a room-wide setup. Each has a use case. None is interchangeable with the others.

A crib canopy is a net that drapes over the cot or crib from a single suspension point, falling around the sleeping surface to a point below mattress height. The mesh should be fine enough to keep mosquitoes and other small biting insects out - a typical mesh count of 156 holes per square inch (about 25 holes per linear inch) is more than sufficient and standard for infant products - and the fabric should be breathable, so that carbon dioxide and humidity do not build up inside the net. Mosticare's baby canopy is built to this specification and is untreated, deliberately: the framing of this product category is untreated, zero-chemical and physical-only.

A crib canopy needs to be set up correctly to work. The net must reach below mattress level all the way around so that a mosquito landing on the outside surface cannot find a gap at mattress height and walk in. The single-suspension canopy is the easiest design for a parent to use correctly: there is no door to remember to close, and the falling fabric self-tucks at the bottom. Two-piece designs (a frame plus a separate net) require the same care at the base.

A stroller or pram net does the work outdoors. It is the barrier during the evening walk, the daytime nap in the garden, the trip to the café terrace. The same fitting logic applies: full coverage, no gaps, including at the bottom edge against the pram frame. A net that drapes over the canopy but does not reach inside the pram body is not doing the protective work.

A room-wide setup is a different product class: a free-standing or ceiling-suspended net covering a bed, or a fitted net on a playpen or travel cot. These are usually harder to fit correctly than a single-suspension crib canopy. A parent who chooses a free-standing net for a small baby needs to be sure the net is supported above the infant's reach - older infants grab and pull. Free-standing nets that an infant can grab at face height are not appropriate for the age group covered by this article.

A practical parent question is whether a long-sleeved bodysuit and pyjamas replace the net. They do not. Clothing reduces the surface area available for mosquito bites but does not eliminate the bites on exposed skin (face, hands, feet). For an infant who is awake, the net is the answer. For an infant who is asleep, the net plus clothing is the answer. The combination of the two is what makes a summer night routine work for a household in a tiger-mosquito area.

The treated-net misconception

The mosquito net universe splits into two product classes with very different regulatory profiles: untreated nets, and insecticide-treated nets. The boundary between them is the regulatory boundary, and the appropriate-use population for each class is different.

Untreated nets are physical barriers. They are not biocidal products. They do not carry a label under EU BPR. They are the right product for routine infant protection in a non-endemic European home. WHO prequalification, EU BPR authorisation, and the active-ingredient chemistry of permethrin and other pyrethroids do not apply to this product class. This is the baby/crib end of the market.

Insecticide-treated nets (ITNs) are a global-health intervention for malaria-endemic regions. They use permethrin or another pyrethroid at controlled doses that repel and kill mosquitoes on contact. The product class is regulated under the WHO Prequalification Programme for Vector Control Products and under EU BPR. They are deployed by national malaria control programmes in endemic regions (sub-Saharan Africa, parts of South-East Asia, parts of Latin America); they are not the recommended product for routine infant protection in non-endemic European homes. Treating an infant's cot or pram with permethrin moves the product out of the untreated canopy class and into the treated-net class, with all the regulatory and labelling consequences that follow.

A parent who sees a treated net for sale online for use around infants is seeing a product class that exists for a different use case, in a different population, in a different regulatory frame. It is not the safer option for a European baby. It is the wrong product for the use case.

European consumer markets have not generally offered treated nets for infant use precisely for this reason. The treated-net value proposition is in the global health frame; the European infant-mosquito decision is a physical-barrier decision, and the right product for it is an untreated canopy.

Source reduction - the half of infant protection people skip

The protection around the crib is half the picture. A crib canopy inside an open window with a half-cleared gutter and water-filled plant saucers ten metres away is doing the work inside the room while the infestation is recruited outside.

Aedes albopictus breeds in standing water at the household scale. The characteristic breeding sites are: blocked roof gutters; plant saucers; pet water bowls that are not refreshed daily; buckets, tarpaulins and toys that hold water after rain; discarded tyres; drains and inspection covers; and any container that holds water for longer than a week in temperatures between roughly 16 and 32 °C. The mosquito needs a small volume of water (a single saucer), not a pond. Breeding sites within a hundred metres of a house drive the population that enters that house.

The protection outside the net is structural and active. It is emptying the saucers, clearing the gutters, refreshing the pet bowl, covering the water butt, and disposing of the tyre. It is window and door screening on the rooms that open onto the garden. It is a fan on the terrace in the evening - tiger mosquitoes are weak fliers and a steady cross-breeze drops their feeding rate measurably. Each of these is a household decision, not a product decision, and each of them reduces the mosquito population that ends up testing the crib canopy.

The combination - a fitted untreated canopy in the bedroom, source reduction around the house, screening on the windows, a fan on the evening terrace - is what effective infant protection in a European tiger-mosquito area looks like in practice.

Common mistakes that parents make

A short list of the recurring missteps, in roughly the order of frequency:

Using a repellent on an infant under six months because the label was not read in full, or because a "natural" or "gentle" formulation was assumed to override the age exclusion. There is no formulation of skin-applied repellent authorised for this age group. The exclusion is in the regulation, not the marketing.

Using a treated net for a routine infant protection setup because treated nets sound more effective. They are more effective against mosquitoes in a malaria-endemic use case; they are the wrong product in a European infant-protection use case.

Buying a stroller net that does not reach inside the pram body. A net draped over the canopy but loose at the foot-end lets mosquitoes in. The net must reach inside the pram at the bottom and be tucked in.

Reaching for citronella candles, essential oil diffusers, ultrasonic plug-in repellents, or wearable repellent wristbands as the "natural" alternative. The European and US evidence base on citronella candles, diffusers, ultrasonic repellents and wristbands does not support reliable protection at the household scale. They are not a substitute for the net, and they are not appropriate substitutes for the source-reduction work.

Skipping the windows-and-screens argument. If the bedroom window is open without a screen and the mosquito is in the room, the net works but the room is already populated. Screening on bedroom windows is a force multiplier on the canopy.

Mistaking "chemical-free" for "claim-free". A product labelled "chemical-free" is not the same as a product that does not carry regulatory claims. An untreated canopy that is correctly framed as a physical barrier - with no permethrin, no WHO prequalification claim, no BPR claim - is the parent of a marketing category. Not every "natural" mosquito net is built this way, and parents reading labels need to distinguish.

What the European market looks like going into the 2026 season

The geography that drives the under-six-months rule across the four Mosticare markets continues to move north. The European Centre for Disease Prevention and Control (ECDC) maps show Aedes albopictus established across most of Italy, large parts of southern France including 64 départements as of 2025, southern and western Germany (Baden-Württemberg, Bayern, Hessen, parts of NRW), and established populations in parts of Austria and Switzerland. Established populations in 2025 are also present in the Madrid region, parts of Catalonia, the Balkans, and Greece.

The 2025 autochthonous season in southern France - 809 chikungunya cases and 30 autochthonous dengue cases in metropolitan France recorded by Santé publique France in its May 2026 bilan - set a record for chikungunya in non-endemic Europe. Germany recorded its first locally acquired dengue cluster in 2024, and Italy recorded autochthonous dengue and chikungunya in earlier seasons. The health-system cost record from the 2025 French outbreak, published in IJID Regions in 2026, lays out the reason households in DACH and northern Italy are now thinking about the same mosquito that, ten years ago, was only a Mediterranean concern.

The parent's takeaway from this picture is that the under-six-months rule is no longer a Mediterranean-only decision. It applies in Baden-Baden, in Vienna, in Lyon, in Munich, in Stuttgart, in Milan, in Rome, in Bologna, and in every town where Aedes albopictus is now established. The north-European household whose first winter without a baby was 2014 is now in the second summer of parenting an infant in a tiger-mosquito area.

The Mosticare position, restated for clarity

Mosticare publishes the Terrazza gazebo and the baby/crib canopy as untreated mosquito products. They are physical barriers. They are not biocidal products. They do not carry WHO prequalification, EU BPR authorisation, or a permethrin claim. The baby canopy is engineered for the under-six-months use case described in this article - untreated, breathable mesh, single-suspension design, proper tucking at the base. We do not claim OEKO-TEX or GOTS certification for this product (those standards sit in textile and organic-fibre certification, not in a baby's mosquito-protection setup). We do not claim a partnership with any research institute. The recommendation set out in this article is the consensus position of paediatric bodies in our four markets; we are publishing it because it is the right protection for the use case, and because parental decisions that begin with the wrong frame tend to end with the wrong product.

If you have read this far, the action items are short. Confirm the canopy is untreated. Confirm it tucks below mattress level. Empty the plant saucers. Screen the bedroom window. Refresh the pet bowl. Read the label on the repellent before you put it near the baby's skin. These five items are the entire routine.

Sources

• American Academy of Pediatrics. Handbook of Pediatric Environmental Health, current edition. Section on insect repellents.
• US Centers for Disease Prevention and Control. CDC Yellow Book - chapter on Protection Against Mosquitoes, Ticks, and Other Arthropods.
• European Centre for Disease Prevention and Control. Aedes albopictus - current distribution maps.
• European Chemicals Agency. Regulation (EU) 528/2012 - Biocidal Products Regulation (BPR); active substance and product authorisation decisions for DEET, picaridin, IR3535, PMD.
• World Health Organization. Vector Control Product Prequalification Programme - applies to insecticide-treated nets (ITNs) and similar products.
• Santé publique France. Bilan 2025 arboviroses en métropole, May 2026.
• Apouey B et al. From bites to ripple effects: Unraveling the health, economic, and social effects of arboviral epidemics in Mainland France. IJID Regions 2026. PMID 42382010.
• Bundesinstitut für Risikobewertung (BfR). Repellents against mosquitoes and ticks - guidance for consumers. Current edition.
• ANSES. Avis relatif à l'efficacité des produits répulsifs anti-moustiques, current edition.
• Istituto Superiore di Sanità (ISS). Zanzare e salute pubblica - annual bulletin, current edition.