In early January 2025, worried parents across India began flooding paediatric clinics with children running high fevers, persistent coughs, and laboured breathing. Some cases were COVID-19. Some were RSV. But a significant number turned out to be Human Metapneumovirus (HMPV) — a respiratory virus that had been circulating quietly in India for years before it suddenly appeared in national headlines. By February 2025, the ICMR had confirmed over 90 HMPV cases across Bengaluru, Nagpur, Ahmedabad, Chennai, and Salem, prompting a national health advisory.
For most Indian families, the name was completely unfamiliar. But for epidemiologists and paediatricians, HMPV has been on their radar for over two decades — it was first identified in the Netherlands in 2001, and Indian research from Vellore and Pune had been documenting it in hospitalised children since 2004. What changed in 2025 was not the virus — it was public awareness, and the importance of knowing when your child's respiratory illness might need urgent attention.
This guide explains what HMPV is, who is most at risk in India, how it is diagnosed, what treatment looks like, and — most importantly — what Indian families can do right now to protect themselves.
What is HMPV (Human Metapneumovirus)?
Human Metapneumovirus (HMPV) is a respiratory virus belonging to the Paramyxoviridae family — the same family as Respiratory Syncytial Virus (RSV) and parainfluenza virus. It was first discovered in 2001 by Dutch scientists who isolated it from children with respiratory illness, though retrospective testing confirmed the virus had been circulating in humans since at least 1958.
HMPV infects the upper and lower respiratory tract. In most healthy adults and older children, the infection feels like a bad cold or seasonal flu — unpleasant but self-limiting. The danger lies with two groups: young children under 5 years (especially infants under 12 months) and older adults over 65 or immunocompromised individuals, in whom the virus can progress rapidly to bronchiolitis, pneumonia, or acute respiratory distress.
The virus has two main genetic lineages — A and B — each with sub-lineages (A1, A2, B1, B2). Indian surveillance data from the ICMR shows that both lineages A2 and B2 have been dominant in different years, which is why repeat infections are possible: natural immunity from one strain does not always protect against another.
How Common is HMPV in India?
More common than most people realise. Between 2019 and 2023, ICMR's Viral Research and Diagnostic Laboratories Network (VRDLN) tested over 20,000 patients across India for HMPV, and 3.2% tested positive. In 2024, the positivity rate remained steady at 3.3% among over 11,000 tested patients.
Prevalence varies significantly by region:
- 4% in Chennai
- 5% in Pondicherry
- Up to 12.7% in Vellore — making it one of the highest documented HMPV prevalence rates among hospitalised children in Asia
Among all paediatric respiratory hospitalisations in India, HMPV accounts for approximately 4–10% of confirmed cases, making it the second or third most common cause of viral respiratory illness in children after RSV and influenza.
The highest infection rates are seen in children aged 1–2 years, with positivity rates of 4.5–4.6% consistently across surveillance periods. But adults with chronic lung disease, heart disease, or weakened immune systems are also at significant risk.
Seasonal Pattern in India
Like influenza and RSV, HMPV follows a seasonal pattern in India, peaking between January and March (the winter months in North India) and sometimes extending into the pre-monsoon period in South India. This timing explains why the 2025 outbreak became visible in January — cold, dry air combined with crowded indoor spaces creates ideal conditions for respiratory virus transmission.
How Does HMPV Spread?
HMPV spreads through respiratory droplets and direct contact — the same routes as the common cold, influenza, and COVID-19. When an infected person coughs, sneezes, or talks, they release virus-containing droplets that can infect others nearby.
The virus can also survive on surfaces for several hours. Touching a contaminated surface (door handles, mobile phones, school desks, railings in hospitals and clinics) and then touching the eyes, nose, or mouth is a documented route of transmission.
Key transmission scenarios in India:
- Crowded schools and crèches: Young children share toys, hands, and close indoor space, making pre-school classrooms efficient transmission environments
- Joint family households: Multi-generational homes mean infected children can readily expose elderly grandparents, who face the highest risk of severe illness
- Outpatient clinics and hospitals: Patients waiting in crowded OPD queues during respiratory illness season are at risk of cross-infection
- Public transport: Buses, metro trains, and local trains where people breathe shared air in close proximity
Unlike Nipah virus or COVID-19, there is no evidence of airborne transmission over long distances with HMPV. The risk is primarily from close contact within roughly 1–2 metres of an infected person.
Symptoms of HMPV: What to Watch For
The challenge with HMPV is that its symptoms overlap significantly with several other respiratory illnesses common in India — influenza, RSV, the common cold, and COVID-19. Knowing the pattern of progression helps.
Mild to Moderate HMPV (Most Cases)
Most infections cause symptoms that peak around days 3–5 and resolve completely within 7–10 days:
- Fever (38–39°C / 100–102°F) — typically present in 70–80% of cases
- Dry or wet cough — often persistent, worsening at night
- Nasal congestion and runny nose (naak behna)
- Sore throat (gale mein dard)
- Fatigue and body aches
- Loss of appetite — especially notable in young children who refuse feeds
In infants and toddlers, watch for increased irritability, rapid breathing, and poor feeding as early warning signs.
Severe HMPV: When to Seek Urgent Care
Approximately 20% of children hospitalised with HMPV infection require ICU admission. Danger signs that require immediate medical attention:
- Rapid breathing (more than 60 breaths per minute in infants, 40 in older children, 30 in adults)
- Chest retractions — the skin pulling in visibly between the ribs or at the neck during breathing
- Nasal flaring — nostrils widening with each breath, a sign of respiratory distress
- Cyanosis — bluish or greyish discolouration of the lips, tongue, or fingernails
- Wheezing — a high-pitched whistling sound when breathing out
- Persistent high fever (above 39.5°C) not responding to paracetamol
- Dehydration — dry mouth, no tears when crying, no urine for more than 6 hours in an infant
- Altered consciousness — unusual drowsiness, difficulty waking, or confusion in older children or adults
If any of these signs appear, do not wait — go directly to a hospital emergency.
HMPV Complications in High-Risk Groups
| Group | Risk | Common Complication |
|---|---|---|
| Infants under 12 months | Very High | Bronchiolitis, hospitalisation |
| Children 1–5 years | High | Pneumonia, croup |
| Adults 65+ | High | Severe pneumonia, respiratory failure |
| Immunocompromised (cancer, HIV, post-transplant) | Very High | Prolonged illness, secondary bacterial pneumonia |
| Chronic lung disease (asthma, COPD) | Moderate–High | Acute exacerbation |
| Heart disease | Moderate | Worsening of underlying condition |
HMPV Diagnosis: Which Tests Are Used?
Ordinary blood tests (CBC, CRP) cannot diagnose HMPV — they may show elevated white cell counts suggesting infection, but cannot identify the specific virus. The gold standard for HMPV diagnosis is:
RT-PCR (Real-Time Polymerase Chain Reaction)
The HMPV RT-PCR test is a molecular test that detects the genetic material (RNA) of the virus in a respiratory sample — typically a nasal swab, throat swab, or nasopharyngeal swab. It has a sensitivity of 95–100% for detecting HMPV when collected in the first 3–5 days of illness (when viral loads are highest).
Cost in India: ₹1,500–₹3,500 depending on the laboratory and city. Major diagnostic chains including SRL Diagnostics, Redcliffe Labs, and Neuberg Diagnostics now offer HMPV RT-PCR panels.
Turnaround time: 12–24 hours at most large diagnostic labs.
Most clinics and hospitals now use respiratory multiplex PCR panels — a single swab tested for 10–20 respiratory pathogens simultaneously, including HMPV, influenza A/B, RSV, COVID-19, parainfluenza viruses, adenovirus, and rhinovirus. This is especially useful when the clinical picture is unclear.
When Should You Get Tested?
Your doctor may recommend HMPV testing if:
- Your child has severe respiratory illness requiring hospitalisation
- A person with chronic illness or immune suppression develops respiratory symptoms
- You need to confirm the cause of an outbreak in a nursery, school, or care home
- You want to avoid unnecessary antibiotics (HMPV is a virus; antibiotics do not work against it)
For mild illness in otherwise healthy individuals, most doctors will advise symptomatic treatment without testing, as the result will not change management.
Storing Your Test Results Digitally
If your child or family member has had respiratory illness testing — whether for HMPV, influenza, or COVID-19 — keeping digital records makes future consultations much easier. Upload your reports to MedicalVault so that every subsequent doctor can see the full history of respiratory illnesses, past hospitalisations, and which viruses have been confirmed in your family.
Treatment: What Works for HMPV?
Here is the honest answer: there is no approved antiviral drug for HMPV. Unlike influenza (where oseltamivir/Tamiflu can shorten illness), HMPV has no equivalent. All treatment is supportive — meaning it manages symptoms and complications rather than targeting the virus directly.
At Home (Mild Cases)
For otherwise healthy children and adults with mild HMPV:
- Paracetamol (e.g., Crocin, Dolo-650) for fever — follow age-appropriate dosing strictly
- Adequate fluids: ORS (Electral, Pedialyte), coconut water, warm daal ka paani, warm water with honey (for children over 1 year)
- Rest: Limit school, outdoor activity, and social interaction until fever-free for 48 hours
- Steam inhalation with plain water (not Vicks or any additive for infants): can help relieve nasal congestion
- Saline nasal drops or spray for infants who cannot blow their nose
- Humidifier in the child's room during dry winter months
Do NOT give aspirin to children with viral infections — it carries a risk of Reye's syndrome.
In Hospital (Moderate to Severe Cases)
Children and adults with significant respiratory distress may need:
- Supplemental oxygen therapy via nasal prongs or face mask to maintain oxygen saturation above 94%
- IV fluids if the child is dehydrated and unable to feed adequately
- Bronchodilators (e.g., salbutamol nebulisation) if there is significant wheezing — though evidence for benefit in bronchiolitis is mixed, and your treating doctor will decide
- High-flow nasal oxygen or CPAP for severe respiratory failure
- Antibiotics only if a secondary bacterial pneumonia develops — not for HMPV itself
The average hospital stay for HMPV bronchiolitis or pneumonia in India is 3–7 days. Most children recover fully.
Prevention: Protecting Your Family
Since there is no vaccine for HMPV (as of 2026), prevention relies entirely on hygiene, behaviour, and reducing exposure — the same principles that reduce transmission of influenza and COVID-19.
Practical Prevention Steps
Hand hygiene is the single most effective measure:
- Wash hands with soap and water for at least 20 seconds after coughing, sneezing, using the toilet, or returning home
- Use alcohol-based hand sanitiser (minimum 60% alcohol) when soap and water are not available
- Teach young children to wash hands before eating and after school
Respiratory etiquette:
- Cover coughs and sneezes with a tissue or the crook of the elbow — not the palm (which then transfers virus to surfaces)
- Dispose of used tissues immediately and wash hands
- Wear a mask in crowded settings if you or a family member has respiratory symptoms
Reduce exposure during peak season (January–March):
- Avoid taking infants and toddlers to crowded OPDs, malls, and wedding functions during the respiratory illness season unless necessary
- If you have a child who is unwell, keep them home from school or crèche until fever has resolved for 48 hours
Protect high-risk family members:
- If a child in the household is sick, minimise direct contact with elderly grandparents and anyone with chronic illness
- Ensure elderly family members receive influenza vaccination annually — while this does not prevent HMPV, it reduces the total burden of respiratory illness and the risk of co-infections that can be dangerous
Disinfect high-touch surfaces:
- Wipe down mobile phones, remote controls, door handles, light switches, and toys with a disinfectant wipe during illness in the household
Should You Wear a Mask?
The Indian government does not currently recommend universal masking for HMPV. However, wearing a mask is a reasonable personal precaution if:
- You are visiting a crowded OPD or hospital
- You have an infant or immunocompromised family member at home and are unwell yourself
- You work in a healthcare setting
A surgical mask reduces transmission significantly; an N95 is not required.
HMPV vs Other Respiratory Illnesses: Key Differences
Indian families often ask: "How do I know if it's HMPV, COVID-19, influenza, or just a regular cold?"
| Feature | HMPV | Influenza | RSV | COVID-19 | Common Cold |
|---|---|---|---|---|---|
| Onset | Gradual over 2–3 days | Sudden, within hours | Gradual | Gradual to sudden | Gradual |
| Fever | Common (70–80%) | High (38–40°C) | Common in children | Common | Low or absent |
| Cough | Prominent | Prominent | Prominent | Prominent | Mild |
| Wheezing | Common (especially infants) | Uncommon | Very common | Uncommon | Rare |
| Diagnosis | RT-PCR | Rapid antigen or RT-PCR | RT-PCR | Rapid antigen or RT-PCR | Usually clinical |
| Treatment | Supportive only | Antiviral (Tamiflu) available | Supportive only | Antivirals for high-risk | Supportive only |
| Vaccine | None | Available annually | Available (new) | Available | None |
If your child or family member has symptoms and you want certainty about the diagnosis, a multiplex respiratory PCR panel will identify the specific virus — useful if the illness is severe enough to warrant hospitalisation.
Keeping Track of Respiratory Illness in Your Family
For families with young children, elderly grandparents, or members with chronic illness, keeping organised health records is more than a convenience — it helps every doctor who sees your family understand the full picture.
If your child has been hospitalised for HMPV bronchiolitis, upload the discharge summary to MedicalVault. If a family member had pneumonia treated with antibiotics, keep the chest X-ray report and culture results organised. MedicalVault's family sharing feature means that when your child sees a new paediatrician or you consult a specialist, the complete respiratory history is available instantly.
The trend analysis feature is also useful for families dealing with recurrent respiratory infections — patterns visible across multiple reports can help a doctor identify underlying conditions like asthma or immune deficiency that might otherwise be missed.
Key Takeaways
- HMPV is a common respiratory virus that has been circulating in India for decades — the 2025 outbreak raised awareness, but the virus itself is not new
- Young children under 5 and adults over 65 are at the highest risk of severe illness; most healthy adults experience only mild cold-like symptoms
- RT-PCR (nasal or throat swab) is the gold standard for diagnosis, available at major diagnostic chains for ₹1,500–₹3,500; a multiplex panel tests for multiple viruses simultaneously
- There is no approved antiviral for HMPV — treatment is supportive (paracetamol, fluids, rest at home; oxygen and IV fluids in hospital for severe cases)
- Hand hygiene, respiratory etiquette, and reducing crowded indoor exposure during peak season are the most effective prevention strategies
- No vaccine exists yet — annual influenza vaccination reduces the overall respiratory illness burden and should be maintained for high-risk family members
- Urgent warning signs — rapid breathing, chest retractions, cyanosis, or dehydration — require immediate hospital evaluation, not watchful waiting
- Storing respiratory illness test reports digitally with MedicalVault helps future doctors understand your family's medical history and avoid unnecessary repeat investigations