HMPV in the UK 2026: Human Metapneumovirus Symptoms and When to Call the GP

UKHSA respiratory surveillance recorded hMPV positivity peaking around 3.4 per cent through winter 2025-26, with the highest rates in young children.

You may have seen human metapneumovirus — usually shortened to hMPV — in news headlines since late 2024, first in reports about rising cases in China and then in UK winter surveillance updates through early 2026. It can be hard to know what to make of a virus you have never heard of, especially when it appears alongside familiar names like flu, RSV and COVID-19.

Here is the straightforward version. hMPV is a respiratory virus that has been circulating in human populations for decades — probably more than half a century. Most children have been exposed by the time they start school. For the majority of otherwise healthy adults it causes an unpleasant but manageable cold-like illness that passes without medical treatment.

This article explains what hMPV is, what symptoms to expect, how it compares to other winter viruses, who is most at risk, and — most importantly — when a cough or fever should prompt a phone call to your GP or NHS 111. Everything here is drawn from UK Health Security Agency (UKHSA) surveillance data, NHS guidance and published research current to June 2026.

What is human metapneumovirus and why are people talking about it in 2026

Human metapneumovirus was first formally identified by Dutch researchers in 2001, but retrospective testing of stored samples suggests it had been circulating in humans for at least 50 years before that. It belongs to the Pneumoviridae family, making it a close relative of respiratory syncytial virus (RSV) — the virus that causes bronchiolitis in young children every winter. Despite the family connection, hMPV and RSV are distinct viruses with no cross-immunity, meaning catching one does not protect you from the other.

hMPV entered wider public awareness in late 2024 when Chinese health authorities reported an increase in respiratory infections, with hMPV detections among them. The World Health Organization reviewed the situation in January 2025 and concluded that the rise was within the expected seasonal range for the time of year. There was no declaration of an outbreak of international concern, and the episode was consistent with the virus behaving as it always has: peaking in colder months.

In the UK, winter 2025-26 followed the usual pattern. UKHSA respiratory surveillance showed hMPV test-positivity rising from around 2.4 per cent in week 51 of December 2025 to 3.4 per cent in weeks 52 and 2 of January 2026. The peak was concentrated in children under 5, whose positivity rate reached 6.4 per cent in week 52. By late April 2026, overall positivity had settled to roughly 2.9 per cent, with the highest rate shifting to school-age children aged 5 to 14 at 7.7 per cent. A medRxiv pre-print examining sentinel laboratory data from England between 2012 and 2025 confirms that hMPV is a recurring seasonal pathogen with a consistent late-winter and early-spring peak, comparable in scale to influenza B.

hMPV symptoms in plain English: what it actually feels like

If you catch hMPV and you are otherwise healthy, the experience will feel familiar. The first couple of days tend to bring a runny or blocked nose, a scratchy or sore throat, and a general sense of tiredness. A cough usually develops by day two or three, sometimes dry, sometimes productive. A mild fever — typically between 37.5°C and 38.5°C — is common but not universal. Some people also notice mild muscle aches or a headache.

For most adults, this is the worst of it. The cough can linger for a week or two after the other symptoms have cleared, which is normal for any respiratory virus. By day 7 to 10, most people feel substantially better.

In some cases, particularly in young children and people with underlying lung conditions, hMPV spreads from the upper airways into the lower respiratory tract. This is when things become more serious. The signs include a worsening cough, wheezing, noisy breathing (stridor), breathlessness that was not there at the start, and in children, the characteristic fast, laboured breathing of bronchiolitis. Pneumonia is an uncommon but recognised complication. Children under 5 may also develop croup, with its distinctive barking cough.

A key practical point: the fever in hMPV is usually moderate. A temperature persistently above 38.5°C or lasting more than five days is not typical and warrants a call to your GP. For parents, the most useful question is not “what virus is this?” but “how is my child coping?” — normal feeding, reasonable energy between naps, and comfortable breathing are reassuring signs.

How hMPV differs from a cold, flu, RSV and COVID-19

The honest answer is that, in day-to-day practice, these viruses are very difficult to tell apart on symptoms alone. A blocked nose, cough, sore throat and low-grade fever can be caused by hMPV, RSV, influenza A or B, COVID-19, rhinovirus, adenovirus or parainfluenza. GPs and practice nurses know this well, which is why routine GP consultations for mild upper respiratory infections in healthy adults do not usually involve specific viral testing.

There are some broad differences worth knowing. Influenza tends to hit harder and faster, with a sudden high fever, pronounced headache and significant muscle aches that can leave people bed-bound within hours. COVID-19 has become more variable since its early waves, but loss of taste or smell and a persistent dry cough remain common features. RSV and hMPV are the most similar to each other, which makes sense given they belong to the same viral family — both cause bronchiolitis in infants and both can trigger asthma or COPD flare-ups in adults.

In the UK, testing strategy still prioritises COVID-19 and influenza for adults in higher-risk groups, partly because effective antivirals exist for both. hMPV testing in primary care is extremely rare; it is mainly carried out in hospitals, for patients who are severely unwell, immunocompromised, or part of research programmes. A hospital respiratory panel will detect hMPV alongside other viruses, but for most people the practical advice — rest, fluids, manage your temperature, and watch for red flags — is the same regardless of which virus is responsible.

Who is at higher risk of severe illness

For most healthy adults, hMPV is no more than a heavy cold. But certain groups are more likely to develop complications, and it is worth knowing who they are so that the people around them can act quickly if symptoms worsen.

Infants under 12 months are the group most likely to be admitted to hospital with hMPV. Their small airways are easily narrowed by the inflammation and mucus that hMPV causes, leading to bronchiolitis and breathing difficulties. Premature babies and those born with heart or lung conditions face a higher risk still.

Adults over 65 are the second major group, particularly those with existing chronic conditions. People living with asthma, chronic obstructive pulmonary disease (COPD), or cystic fibrosis are prone to significant flare-ups triggered by hMPV. Similarly, anyone with heart failure or significant cardiovascular disease may find their symptoms worsen during a respiratory infection. Pregnant women are included in higher-risk guidance because of the physiological changes pregnancy brings to the respiratory and immune systems.

People who are immunosuppressed — whether through medications such as chemotherapy, biologics or high-dose steroids, or through conditions like HIV or organ transplant — tend to shed hMPV for longer and are at greater risk of lower respiratory complications. Clinicians treating these groups will generally have a lower threshold for investigation and admission. If you are in one of these groups and develop a respiratory illness that is getting worse rather than better after three to four days, contact your GP surgery or NHS 111 without delay.

When to call the GP, NHS 111 or 999

Most hMPV infections resolve at home. The question that matters is when self-care is no longer enough. The guidance below is drawn from NHS and Public Health Scotland advice and reflects standard UK clinical thresholds.

Self-care at home is appropriate when:

You have cold-like symptoms, a mild cough, and a low-grade fever that responds to paracetamol or ibuprofen. You are drinking fluids, keeping food down, and managing day-to-day activities, even if you feel rough.

Contact your GP surgery for a same-day appointment if:

Your fever has persisted above 38°C for more than five days. Your cough is getting worse rather than better after a week. You have an underlying lung or heart condition and your symptoms are triggering a flare-up. You are immunosuppressed and are not improving.

Call NHS 111 if:

You are finding it harder to breathe than usual, but not in acute distress. You cannot keep fluids down and are showing early signs of dehydration — dark urine, dizziness, dry mouth. You are concerned about a child who is drinking less than half their normal amount or who seems unusually lethargic between fevers.

Call 999 or go to A&E if:

Severe breathlessness or breathing very fast. Lips, tongue or face turning blue or grey. A child who is grunting with each breath or whose ribs visibly suck in (retraction). Confusion, drowsiness or difficulty staying awake. Sudden collapse or unresponsiveness.

For children in particular, trust your instincts. Parents and carers are usually good at recognising when something is seriously wrong. If a child’s breathing looks effortful, if they are refusing fluids, or if they are not themselves in a way that worries you, do not wait — seek help.

Treatment options at home and in hospital

Supportive care — rest, fluids and paracetamol — is the mainstay of hMPV treatment for the vast majority of people.

hMPV is a virus, and like all viruses it does not respond to antibiotics. Antibiotics target bacteria, and prescribing them for a viral illness provides no benefit while contributing to antibiotic resistance — a genuine and growing public health concern. Antibiotics may be considered only if a clinician suspects a secondary bacterial infection such as bacterial pneumonia has developed on top of the viral illness.

For the vast majority of people, treatment is entirely supportive. That means rest, plenty of fluids, and paracetamol or ibuprofen to manage fever, sore throat and general aches. Paracetamol is usually the first choice for children; ibuprofen can be used in children over 3 months if paracetamol alone is not sufficient, but always follow the dosing instructions on the packet or as advised by your pharmacist or GP. Saline nasal drops or sprays can ease congestion, especially in young children who struggle to feed with a blocked nose. Sitting more upright — propped up with pillows at night — can make breathing more comfortable when there is a lot of chest congestion.

In hospital, care escalates according to need. Oxygen therapy for low blood oxygen levels, intravenous fluids for dehydration, and in severe cases respiratory support are all standard measures. There is no licensed antiviral drug specifically for hMPV. Research into potential antivirals is ongoing, but nothing is available for clinical use at present.

The vast majority of people who catch hMPV will never need any of this. The illness runs its course, the cough fades, and life returns to normal. The role of treatment is to keep you comfortable and to step in quickly if complications develop.

Preventing hMPV in the UK in 2026: vaccines, hygiene and protecting vulnerable family members

As of June 2026, there is no licensed hMPV vaccine anywhere in the world, including the UK. Several candidate vaccines — including mRNA and protein-subunit designs — are in phase 1 or 2 clinical trials, and it is reasonable to hope that a vaccine may become available in the coming years, but nothing is approved for public use yet. This remains an area of active research.

In the meantime, the practical prevention measures are the ones the NHS has been recommending for respiratory infections for years. Wash your hands frequently with soap and water for at least 20 seconds. Catch coughs and sneezes in a tissue, bin the tissue, and wash your hands. Ventilate rooms by opening windows, even briefly, during the colder months. If you have a respiratory infection, stay home until you are feeling well and avoid close contact with people who are at higher risk.

It is also worth staying up to date with the vaccines that are available. Annual flu vaccination and the routine COVID-19 booster do not protect against hMPV, but they reduce the chance of catching flu and COVID-19 at the same time, which can make any respiratory illness more serious — particularly for older adults and people with chronic conditions. If someone in your household is immunosuppressed, very young, or elderly, simple measures like not sharing cups or cutlery during a household illness and keeping a reasonable distance when you are symptomatic can make a practical difference. You cannot eliminate the risk, but you can lower it.

Frequently Asked Questions

Is hMPV the same as RSV?

No. hMPV and RSV are related — both belong to the Pneumoviridae family — but they are distinct viruses. They cause similar symptoms, both peak in winter, and both can lead to bronchiolitis in infants and pneumonia in vulnerable adults. However, they are tested for separately in hospital settings, and there is no cross-immunity between them. Catching one does not reduce your chance of catching the other.

Can you catch hMPV more than once?

Yes. Reinfection throughout life is normal. Immunity after hMPV infection is partial and fades over time, which is why most people will encounter the virus repeatedly. In healthy adults, repeat infections are usually milder than the first. In older adults and those with chronic conditions, reinfection can still cause significant illness, which is why vigilance matters in those groups even if someone has been unwell with similar symptoms before.

How long am I contagious with hMPV?

Adults typically shed the virus for around five days after symptoms begin, though this can be slightly longer in some cases. Children and immunosuppressed people may shed virus for one to two weeks. Standard NHS advice applies: stay home and avoid close contact with others until you feel well enough to carry on with normal activities. There is no fixed isolation period set for hMPV in UK guidance.

Is hMPV tested for at my GP surgery?

Almost never. Routine UK GP practice does not include swabbing for hMPV in adults presenting with mild upper respiratory symptoms. Testing is carried out mainly in hospitals, for patients who are severely unwell, immunosuppressed, or admitted with lower respiratory tract infections. If you visit your GP with cold-like symptoms, the clinical assessment and advice will be the same whether the cause is hMPV, RSV or another respiratory virus.

Should I get a private respiratory virus PCR if I am unwell?

Generally, no. Private multiplex PCR panels that include hMPV are available, but the result will not change the management of a mild illness in an otherwise healthy person. Treatment is supportive and identical regardless of which virus is responsible. If you are in a high-risk group and your clinician needs to make a treatment decision, hospital-level testing will be arranged. For everyone else, a private test is unlikely to add useful information.

Is there a vaccine for hMPV in the UK in 2026?

No. There is no licensed hMPV vaccine in the UK or elsewhere as of June 2026. Several candidate vaccines are in early clinical trials and the development pipeline is active, but none have reached the stage of regulatory approval or public availability. The most practical prevention steps remain good respiratory hygiene, staying home when unwell, and keeping up to date with the flu and COVID-19 vaccines that are available.

My child has hMPV symptoms in summer. Should I be more worried?

Summer hMPV infections are uncommon but not unheard of. UKHSA surveillance shows low background positivity outside the winter peak. If your child is otherwise well, feeding normally, and has energy between naps, treat the illness as you would any summer cold — fluids, rest and paracetamol if needed. The red-flag rules still apply at any time of year: difficulty breathing, dehydration, persistent fever or rapid worsening all warrant a call to your GP or NHS 111, regardless of the season.

This article is informational only and does not replace personalised advice from your GP, pharmacist, or another qualified healthcare professional.