Respiratory syncytial virus (RSV) is a common cause of respiratory infections.
While it affects people of all ages, infants and young children are most frequently affected.
Infants and older adults are most at risk of serious illness.
It occurs more frequently in autumn and winter.
Most people have mild to moderate illness that self-resolves.
Infants and people with pre-existing heart or lung problems or a weakened immune system have a higher risk of serious illness.
It can spread from person-to-person so good hand washing, respiratory hygiene and cleaning practices are important in preventing RSV.
Call an ambulance or go to your nearest hospital emergency department if your child is turning blue, having trouble breathing, or is breathing very quickly.
Vaccination to protect people aged 60 years and older from severe illness due to RSV is available. Speak to your GP or pharmacist.
The RSV vaccine is not funded under the National Immunisation Program.
Respiratory syncytial virus, or RSV, is a common virus that can cause respiratory infections that affect the airways and lungs.
It affects people of all ages but especially infants and young children. Most young children have been infected with RSV at some stage by the age of 2 years. It is usually seasonal, occurring more frequently in autumn and winter.
It is one of the most frequent causes of the common cold and ear infections. It can also cause more serious respiratory infections such as:
bronchiolitis (infection of the small airways in the lungs)
RSV can also worsen pre-existing heart or lung problems such as heart failure or asthma.
Symptoms of RSV
Symptoms usually occur within 5 days but can occur as soon as one day or up to 10 days after exposure to the virus. Symptoms usually last for 1 to 2 weeks.
Most people get mild to moderate illness that self-resolves. Symptoms are similar to a common cold and can include:
Signs and symptoms of serious respiratory infections such as bronchiolitis, pneumonia and croup can include:
looking or feeling very unwell
wheezing or difficulty breathing including rapid, shallow or irregular breathing
blue discolouration or paleness of the skin
looking or feeling very tired or irritable
eating or drinking less than their usual amount
persistent or high fevers
worsening cough or mucous producing cough.
Seek medical care if symptoms do not resolve, symptoms worsen, or if there are signs and symptoms of serious respiratory infections.
Call an ambulance or go to your nearest hospital emergency department if your child is turning blue, having trouble breathing, or is breathing very quickly.
Spread of RSV
A person with RSV is infectious from just before the onset of illness until usually 10 days after symptoms begin, but this may be longer in people with ongoing symptoms or serious illness.
RSV can spread easily from person-to-person through:
respiratory droplets, such as from coughing or sneezing
touching objects and surfaces contaminated with respiratory droplets.
The virus can survive on objects and surfaces for several hours so good cleaning, hand washing, and respiratory hygiene practices are important in preventing spread.
People who have previously had RSV are still susceptible to repeat infections.
High-risk groups
Infants, young children, older adults, Aboriginal and Torres Strait Islander people, and people with a pre-existing heart or lung problem or a weakened immune system are most at-risk of serious illness from RSV.
Prevention of RSV
An RSV vaccine (Arexvy®) is recommended for all adults aged 75 years and older, as well as adults aged 60-74 years who may be at higher risk of severe disease, to protect against illness and complications from RSV infection.
The RSV vaccine is not funded on the National Immunisation Program. Speak to your doctor or pharmacist to learn more about the vaccine, eligibility and cost.
People are strongly advised to stay up-to-date with recommended vaccination against other respiratory infections, such as influenza and COVID-19.
Good cleaning, hand hygiene and respiratory hygiene practices are important in preventing the spread of RSV, especially in people with symptoms:
Stay home if unwell.
Cover the mouth and nose when coughing or sneezing, ideally using a disposable tissue.
Regularly wash hands with warm water and soap or use hand sanitiser.
Regularly clean surfaces and objects such as toys that may be contaminated using a household detergent.
Avoid contact with high-risk groups when unwell, such as infants, young children, older people and people with a pre-existing heart or lung problem or a weakened immune system.
Diagnosis of RSV
RSV infections are usually diagnosed from symptoms and clinical examination by the doctor. RSV and other kinds of viruses can only be confirmed by a doctor after a nose or throat swab has returned positive results.
Treatment of RSV
Treatment of RSV is mainly supportive through:
rest
drinking plenty of fluids
paracetamol.
RSV is a viral infection so antibiotics are not effective.
Some people, especially high-risk groups, may require additional treatment from their GP or hospital admission.
2025 RSV infant immunisation program
In Victoria, an infant Respiratory Syncytial Virus (RSV) immunisation program to prevent infants most at risk from severe RSV disease will run from April to September 2025.
Under this new program, a long-acting monoclonal antibody will be available free-of-charge for charge for eligible Victorian infants:
whose mothers did not receive RSV vaccination during pregnancy
who were vaccinated less than two weeks before delivery
who are at increased risk of severe RSV, regardless of their mother’s vaccination status; and
some children entering their second RSV season who are at risk or have medical conditions that place them at higher risk of severe RSV disease.
The RSV Infant Immunisation Program will be delivered through participating public and private birthing hospitals, community health immunisation clinics, general practices, and Aboriginal Health Services.
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