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Human Metapneumovirus (hMPV) - Definition & Symptoms

Human Metapneumovirus (hMPV) is a respiratory virus that can cause flu-like symptoms and, in severe cases, bronchiolitis or pneumonia, particularly in young children, the elderly, and immunocompromised individuals.

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Things worth knowing about "Human Metapneumovirus"

Human Metapneumovirus (hMPV) is a respiratory virus that can cause flu-like symptoms and, in severe cases, bronchiolitis or pneumonia, particularly in young children, the elderly, and immunocompromised individuals.

What is Human Metapneumovirus?

Human Metapneumovirus (hMPV) is an RNA virus belonging to the family Pneumoviridae, first identified in the Netherlands in 2001. It is one of the leading causes of acute respiratory tract infections worldwide and is closely related to the Respiratory Syncytial Virus (RSV). hMPV circulates globally, with peak activity during the winter and early spring months.

Causes and Transmission

hMPV is primarily spread through respiratory droplets released when an infected person coughs or sneezes. Transmission via contaminated surfaces (contact transmission) is also possible. The virus infects the mucous membranes of both the upper and lower respiratory tract.

Direct contact with infected individuals
Inhalation of virus-containing droplets or aerosols
Touching contaminated surfaces and then touching the mouth, nose, or eyes

Risk Groups

Individuals at higher risk of severe illness include:

Infants and young children under 5 years of age
Older adults aged 65 and above
Persons with weakened immune systems (e.g., transplant recipients or those with HIV)
Individuals with chronic lung or heart conditions

Symptoms

Symptoms of an hMPV infection resemble those of the common cold or influenza and can range from mild to severe:

Persistent cough
Runny or stuffy nose
Sore throat
Fever
Shortness of breath and wheezing
In severe cases: bronchiolitis (inflammation of the small airways) or pneumonia

The incubation period is typically 3 to 6 days. Most healthy adults recover fully within 1 to 2 weeks.

Diagnosis

Diagnosis of an hMPV infection is typically made using the following methods:

PCR test (polymerase chain reaction): Detection of viral genetic material from a nasopharyngeal swab; considered the gold standard
Antigen test: Rapid test for direct detection of viral proteins; less sensitive than PCR
Viral culture: Performed in the laboratory, but time-consuming and rarely used in routine clinical practice

In clinical settings, hMPV is frequently detected as part of multiplex respiratory panels that can simultaneously identify multiple respiratory pathogens.

Treatment

Currently, there is no specific antiviral therapy available for Human Metapneumovirus. Treatment is therefore symptomatic and supportive:

Adequate fluid intake
Rest and physical recovery
Fever-reducing medications such as paracetamol or ibuprofen
In cases of respiratory distress: supplemental oxygen in hospital settings, mechanical ventilation in severe cases
In cases of secondary bacterial infection: antibiotics

As of 2025, no licensed vaccine against hMPV is available, although several candidates are in clinical development.

Prevention

Since no vaccine is currently available, general hygiene measures are especially important:

Frequent and thorough handwashing
Maintaining distance from infected individuals
Practicing respiratory etiquette (coughing or sneezing into the elbow)
Regular cleaning and disinfection of frequently touched surfaces
In healthcare settings: isolation precautions for high-risk patients

References

van den Hoogen BG et al. - A newly discovered human pneumovirus isolated from young children with respiratory tract disease. Nature Medicine, 2001; 7(6): 719-724.
Centers for Disease Control and Prevention (CDC) - Human Metapneumovirus (hMPV). Available at: www.cdc.gov
World Health Organization (WHO) - Acute respiratory infections: Human Metapneumovirus. Available at: www.who.int

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