Mosquito Repellent for Babies: What Is Actually Safe Under 2

TL;DR

• Under 2 months: No topical insect repellent of any kind. Use mosquito netting over cribs, strollers and carriers, plus long-sleeved clothing and screened spaces (CDC).

• 2 months and older: DEET up to 30% and picaridin are considered safe when applied as directed. The AAP advises applying DEET sparingly until age 2 and notes 10% DEET is as safe as 30% with no benefit above 50%.

• Under 3 years: Do not use oil of lemon eucalyptus (OLE) or PMD. The CDC and AAP both state this clearly because safety in this age group has not been adequately tested.

• Citronella alone: Keeps insects away briefly and is not EPA-approved for effectiveness as a primary repellent for serious disease settings (AAP).

• India context: Dengue caseload was 233,519 in 2024 and 289,235 in 2023, the highest in five years (NCVBDC); malaria adds another approximately 255,500 cases in 2024.

• Mylo's mosquito range: Patches applied to clothing or stroller (not baby's skin) and a 100% natural spray, both built around citronella, eucalyptus, lemongrass and lavender oils.

Quick Answer: Mosquito repellent for babies follows three clear rules from the leading paediatric and public-health authorities. First, no topical insect repellent should be used on babies younger than 2 months; physical barriers such as mosquito netting over cribs, strollers and carriers are the only safe protection at this age (CDC, "Preventing Mosquito Bites," cdc.gov/mosquitoes/prevention). Second, oil of lemon eucalyptus (OLE) and PMD must not be used on children younger than 3 years (CDC; AAP, "How to Choose an Insect Repellent for Your Child," HealthyChildren.org). Third, for babies older than 2 months, DEET at concentrations of 30% or lower and picaridin are considered safe when applied as directed (US Army Public Health Command Fact Sheet 18-044, 2018; AAP HealthyChildren). For Indian families this matters: per the National Center for Vector Borne Diseases Control (NCVBDC, Ministry of Health and Family Welfare, Government of India), India recorded 233,519 reported dengue cases with 297 deaths in 2024, and 289,235 cases with 485 deaths in 2023 — the highest dengue burden in the last five years.

Why Does Mosquito Protection Matter So Much in Indian Households?

Mosquito-borne disease is not a theoretical risk in India. According to the National Center for Vector Borne Diseases Control (NCVBDC), India's nodal agency for vector-borne disease under the Ministry of Health and Family Welfare:

• 2024: 233,519 reported dengue cases, 297 deaths.

• 2023: 289,235 reported dengue cases, 485 deaths — the highest in the past five years.

• Malaria: approximately 255,500 cases in 2024, down sharply from over a million in 2016 but still a substantial annual caseload (NCVBDC malaria surveillance data).

These are official reported counts. The true number of dengue infections is widely understood to be higher, because only a fraction of cases are laboratory-confirmed and reported. Major dengue-burden states include Karnataka, Kerala, Tamil Nadu, Maharashtra, Uttar Pradesh and Gujarat, all of which report tens of thousands of cases in peak seasons.

Beyond the diseases themselves, mosquito bites cause secondary problems in babies: scratched bites that become infected, and disrupted sleep from itching.

The difficulty is that a newborn's skin barrier is at its thinnest in the first weeks of life, with the highest rate of topical absorption. This is exactly why repellent rules are stricter for the youngest babies, and why the under-2-months protocol is built entirely around physical barriers rather than topical chemicals.

What Should I Use Under 2 Months — Physical Barriers Only?

For the first 8 weeks of life, the guidance is unambiguous. The CDC states that no insect repellent should be used on babies younger than 2 months old, and recommends physical barriers instead.

The reason is the newborn skin barrier. None of the EPA-registered repellent active ingredients (DEET, picaridin, IR3535, OLE/PMD, 2-undecanone) have been approved for babies under 2 months, because their thin skin absorbs topical substances more readily than older skin. At this age, protection comes from keeping mosquitoes away from the baby rather than applying anything to the baby.

The physical-barrier protocol for under-2-month babies:

• Mosquito netting over the sleeping and travel space. Fine-mesh netting over the crib, bassinet, stroller and baby carrier is the single most important protection for a newborn. The CDC specifically recommends covering strollers and baby carriers with mosquito netting.

• Clothing that covers arms and legs. Long-sleeved tops and full-length pants in light, breathable fabric (cotton, muslin) reduce exposed skin without overheating the baby.

• Screened and air-conditioned indoor spaces. Intact window and door screens keep mosquitoes out; air-conditioned rooms further reduce mosquito activity indoors.

• Avoiding peak mosquito hours. Limiting outdoor exposure around dawn and dusk reduces bite risk during the periods Culex and Anopheles mosquitoes are most active. Aedes aegypti, the dengue vector, however bites during the day, so daytime barrier protection matters too.

• Removing standing water around the home. Emptying buckets, pots, flower-pot saucers and other containers once a week removes the breeding sites Aedes mosquitoes need.

What Repellents Are Safe for Babies Older Than 2 Months?

Once a baby is older than 2 months, specific repellents become appropriate at age-appropriate concentrations. The approved options and their protection times are well documented in CDC and AAP guidance:

DEET (N,N-diethyl-meta-toluamide) is the most studied insect repellent and has been in use since 1957. The AAP notes that 10% DEET protects for about 2 hours and 30% DEET for about 5 hours, with no added benefit above 50%, and that 10% DEET is as safe as 30% (US Army PHC Fact Sheet 18-044 / AAP). DEET at concentrations of 30% or lower is considered safe for children over 2 months. The AAP adds an important caution: until children are at least 2 years old, DEET should be applied sparingly, weighing the risk of disease against the risk of absorption.

Picaridin (also called KBR 3023) is a synthetic compound and an effective DEET-free alternative. The AAP states that 5% picaridin protects against mosquitoes for 3 to 4 hours, and 20% picaridin for 8 to 12 hours. Picaridin is generally non-greasy and less odorous than DEET, which many parents find easier to use.

IR3535 is a third EPA-registered option recognised by the CDC. It is less commonly available in Indian retail but is a reasonable alternative.

The critical exclusion: do not use oil of lemon eucalyptus (OLE) or para-menthane-diol (PMD) on children younger than 3 years. Both the CDC and the AAP state this clearly because the safety of these ingredients has not been adequately tested in this age group. This applies even though OLE is "natural" — natural origin does not change the under-3 restriction.

Are Natural Mosquito Repellents Actually Effective?

Citronella, eucalyptus oil, neem oil and lavender are widely marketed as "natural" mosquito repellents. The honest clinical picture is more limited than the marketing suggests.

The AAP states plainly that "natural" repellent ingredients such as citronella keep insects away for only a short time and have not been approved for effectiveness by the EPA. Two Indian-traditional plant ingredients deserve an honest mechanism explanation rather than a marketing line:

• Citronella oil. Steam-distilled from lemongrass-family plants (Cymbopogon nardus, C. winterianus) and used in Indian homes for generations in oils, coils and candles. It works by masking the carbon dioxide and lactic acid cues mosquitoes use to locate a human host. Its weakness is volatility: the active compounds evaporate quickly, which is why protection is short (often under an hour for skin application) and reapplication frequent. Studies of citronella-based products in laboratory settings show that even multiple reapplications of citronella over the course of an evening do not match the duration of a single DEET application.

• Eucalyptus oil. Ordinary eucalyptus essential oil (from Eucalyptus globulus and others) is distinct from the refined, EPA-registered oil of lemon eucalyptus (OLE) (from Corymbia citriodora) and its active component PMD. Plain eucalyptus oil has weaker and shorter repellent action than refined OLE, and OLE itself is not permitted for children under 3 years. Eucalyptus oil works, like citronella, mainly by scent-masking.

• Lemongrass oil and lavender oil carry similar mechanisms (scent-masking) with similar limitations.

• Neem oil, traditionally used in India in lamps and as a body application, has shown some laboratory repellent activity (Sharma et al., Journal of the American Mosquito Control Association), but its duration of action on the skin is short and its safety profile in young infants is not well characterised; pure neem oil should not be applied to broken skin.

The practical takeaway: natural sprays are reasonable as a supplementary layer for older babies, but for the under-2 age group, the safer real-world approach combines physical barriers with patch-based or clothing-based products that minimise skin contact.

Are Mosquito Patches a Safe Option for Babies?

The Mylo Mosquito Repellent Range offers two formats designed around the principle of minimising direct skin contact for young infants:

• Mylo Baby Mosquito Spray — 100 ml spray, made with citronella, eucalyptus, lemongrass and lavender essential oils. Sold as a single bottle and as a pack of 2. As with all natural-ingredient sprays, it should be treated as a supplementary layer and reapplied as the label directs, not relied on as sole protection for a young infant in a high-dengue setting.

• Mylo Mosquito Patches for Kids — pack of 24 (also available in pack of 48). Each patch uses citronella oil, eucalyptus oil, lemongrass oil and lavender oil, is waterproof, and is marketed for up to 12-hour protection per patch. The patch format is the key point. Per Mylo's own application guidance, patches are stuck to clothing, the pram, the bedside or the cot — never to the baby's skin — releasing repellent vapour into the surrounding air.

This delivery model aligns with CDC and AAP guidance for younger infants, because it provides a mosquito-deterrent layer without applying any repellent to delicate skin. The mechanism is the same scent-masking carbon dioxide / skin-odour signature pathway described above, but with no direct skin contact.

Important caveat for under-2-month babies. Even though patches avoid direct skin contact, the under-2-month protocol per the CDC still emphasises physical barriers (netting, clothing, screened spaces) as the primary defence. Patches can be combined with netting at this age, but they do not replace it. For babies 2 months and older, patches plus appropriate clothing plus screened indoor spaces is a reasonable combination, with EPA-registered repellent (DEET 10% or picaridin 5%) added for outdoor periods in high-transmission seasons or areas.

How Do I Apply Mosquito Repellent on a Baby Safely?

For babies older than 2 months, correct application matters as much as the right product:

• Apply to your own hands first, then to the baby. Never spray repellent directly onto a baby's face. Spray onto your hands and gently rub it onto the child's exposed skin, avoiding the eyes and mouth.

• Avoid the hands, eyes, mouth and cuts. Babies put their hands in their mouths, so repellent on the hands becomes ingested repellent. Guidance advises against applying DEET to the hands of children under 12 years for exactly this reason.

• Avoid broken or irritated skin. Repellent should not go on cuts, scratched bites or rashes, where absorption is higher and irritation more likely.

• Use the minimum amount needed. Using more does not improve protection, and concentrations above 50% DEET add no extra protection time. Apply just enough to cover exposed skin for one outing.

• Wash it off when indoors. Wash the baby's skin with soap and water once you are back inside, and wash treated clothing before it is worn again.

• Use sprays in open, ventilated areas. Avoid spraying in enclosed spaces (a closed car, a small bedroom), and never use combination sunscreen-repellent products, since sunscreen needs reapplying every 2 hours while repellent does not.

Frequently Asked Questions

Can I use mosquito repellent on a newborn under 2 months? No. The CDC advises against using any insect repellent on babies younger than 2 months. Use mosquito netting over cribs, strollers and carriers, dress the baby in long-sleeved clothing, and keep indoor spaces screened. This applies to chemical and natural repellents equally — no topical mosquito repellent is approved for this age group.

Is DEET safe for babies? Yes, for babies older than 2 months, at concentrations of 30% or lower (US Army Public Health Command Fact Sheet 18-044, 2018; AAP HealthyChildren). The AAP advises applying it sparingly until age 2, weighing the risk of disease against the risk of absorption. At 10% it protects for about 2 hours and at 30% for about 5 hours, and the AAP notes there is no added benefit above 50%.

Are natural mosquito repellents safe for babies under 1 year? Natural sprays based on citronella, eucalyptus, lemongrass and lavender oils offer short-duration protection only and need frequent reapplication (AAP). They can be a supplementary layer for older babies but are not a primary defence in a high-dengue setting. Oil of lemon eucalyptus (OLE) and PMD are specifically not for children under 3 years per CDC and AAP, even though they are plant-derived.

Are mosquito patches safer than sprays for babies? Patches applied to clothing, strollers or carriers minimise direct skin contact, which suits younger infants where skin absorption is a concern. Mylo Mosquito Patches use citronella, eucalyptus, lemongrass and lavender oils and are marketed for 12-hour protection per patch. For babies under 2 months, combine patches with physical barriers (netting, clothing, screens); patches do not replace netting at this age.

How do I protect my baby from dengue and malaria without a chemical repellent? Use physical barriers: fine-mesh mosquito nets over the cot, stroller and carrier; long-sleeved clothing; screened windows; air conditioning where available; and weekly removal of standing water around the home to cut Aedes breeding (CDC).

Which mosquito repellent ingredient lasts longest for children? Among options used on children over 2 months, 20% picaridin offers the longest protection at 8 to 12 hours, compared with about 5 hours for 30% DEET (AAP). Concentration determines duration, so match it to time spent outdoors.

Is the dengue vaccine an option for my baby in India? A dengue vaccine, Qdenga (Takeda's TAK-003), is approved in several countries including India for use from age 4 in some indications, but it is not yet routinely available across India as a paediatric vaccine for infants. Per the CDC, "there is no widely available dengue vaccine to prevent dengue infection" globally, and prevention still rests on bite avoidance. Discuss vaccine availability with your paediatrician.

Why does my baby seem to attract more mosquito bites than older family members? Mosquitoes locate humans through carbon dioxide, body heat, lactic acid in sweat and skin odour. Infants have higher skin temperatures and exhale CO₂ at a relatively high rate for their size, both of which can make them attractive targets. Thinner skin also means bites itch and inflame more. The mitigation is not different — physical barriers under 2 months, age-appropriate repellent after — but parental vigilance especially in dengue-active months (typically June to November across most of India) matters.

What time of day are dengue-carrying mosquitoes most active? Aedes aegypti, the primary dengue vector, is a daytime biter, most active in early morning and late afternoon, unlike Anopheles (malaria) and Culex mosquitoes, which bite at dawn, dusk and night. This means dengue protection cannot simply rely on evening precautions; daytime barrier protection through clothing, netting on prams and screened spaces is essential.

Sources

• Centers for Disease Control and Prevention (CDC). "Preventing Mosquito Bites." — https://www.cdc.gov/mosquitoes/prevention/index.html

• Centers for Disease Control and Prevention (CDC). "Mosquito Bite Prevention" (PDF, CS356185-A). — https://www.cdc.gov/mosquitoes/pdfs/mosquitobitepreventionus_508.pdf

• Centers for Disease Control and Prevention (CDC). "Preventing Dengue." — https://www.cdc.gov/dengue/prevention/index.html

• American Academy of Pediatrics. "Insect Repellents." Council on Environmental Health policy page. — https://www.aap.org/en/patient-care/environmental-health/promoting-healthy-environments-for-children/insect-repellents/

• AAP HealthyChildren.org. "How to Choose an Insect Repellent for Your Child."

• US Army Public Health Command. "Using Insect Repellents on Children." Fact Sheet 18-044, 2018.

• National Center for Vector Borne Diseases Control (NCVBDC), Ministry of Health and Family Welfare, Government of India. "Dengue Situation in India." — https://ncvbdc.mohfw.gov.in/index4.php?lang=1&level=0&linkid=431&lid=3715

• Mishra A. et al. "Dengue outbreak in state of Uttar Pradesh, North India: lessons learnt and way forwards." International Journal of Scientific Reports 2025 — https://www.sci-rep.com/index.php/scirep/article/view/1542 (citing NCVBDC 2023 and 2024 figures)

• Kumar A. et al. "Dengue dynamics in India: Harnessing auto regressive integrated moving average model for predictive insights." Journal of Family Medicine and Primary Care 2025 — https://pmc.ncbi.nlm.nih.gov/articles/PMC12007755/