RSV

About RSV

Respiratory syncytial virus (RSV) is a common virus that infects the airways and lungs. It is highly contagious and spreads easily. Most children will become infected with RSV before they turn two years of age.¹ The main treatment for RSV infection is rest and plenty of fluids. Regular hand washing and good personal hygiene can stop RSV from spreading.²

RSV Symptoms

RSV starts off with mild cold-like symptoms which may include slight fever, sore throat, headache, and a runny and stuffy nose. Bronchiolitis and pneumonia often follow in young children.

Bronchiolitis is inflammation and congestion of the small airways of the lungs known as the bronchioles. Symptoms may include coughing, wheezing, difficulty breathing and problems eating or drinking.

Pneumonia is an infection that inflames the air sacs of one or both lungs.  Symptoms will also include fever, coughing and trouble breathing.

Death in people under 16 years of age from RSV is rare in high income countries like Australia.

People with RSV are generally contagious for 3 – 8 days. Some infants and people with impaired immune systems may be contagious up to 4 weeks after symptoms subside.³

Most people recover from the infection within 10 days.⁴

How RSV Spreads

The organism that causes RSV infection is a virus called Respiratory Syncytial Virus.

Chain of infection

An infected person can pass the virus onto others by laughing, sneezing, coughing, talking, or touching a surface.

A susceptible person can pick up the virus through the eyes, nose, or mouth from an infected person who has coughed or sneezed into the air. You can also pick up RSV after touching a surface which has the virus on it and then touching your eyes, nose, or mouth.³

RSV Complications

High risk for young children

RSV can cause serious illness in infants under 6 months of age – especially those aged under 3 months. Young children aged under 2 years with chronic lung disease or congenital heart disease are also at greater risk of serious RSV disease. As well as infants and young children aged 2 years and under who were born pre-term or with a low birth weight.⁵

High risk for some adults

Older adults (especially those aged >65 years of age), First Nations peoples, people with heart and lung disease, or people with weakened immune systems are at higher risk of complications and hospitalisation. They may develop pneumonia, more severe symptoms of asthma, chronic obstructive pulmonary disease (COPD), or congestive heart failure.⁵

RSV Prevention

Advise patients/carers that the recombinant respiratory syncytial virus (RSV) can be prevented by various hygiene measures:

• washing your hands with soap and water for at least 20 seconds
• keeping infected people away from others, especially babies and older people
• not sharing drinks, or cutlery with people who have colds
• covering your nose and mouth when sneezing or coughing
• throwing out tissues as soon as you’ve used them

Vaccines

Arexvy

Arexvy is a recombinant respiratory syncytial virus pre-fusion F protein (adjuvanted) vaccine. It is indicated for the active immunisation of individuals 60 years and older for the prevention of lower respiratory tract disease caused by RSV. The vaccine is administered as a single dose of 0.5 mL for intramuscular injection only, preferably in the deltoid muscle. The need for revaccination has not been established. ^6.

Abrysvo 

Abrysvo is also a recombinant respiratory syncytial virus pre-fusion F protein vaccine formulated to actively immunise pregnant patients, particularly between 24-36 weeks of gestation, to prevent lower respiratory tract disease caused by Respiratory Syncytial Virus (RSV) in infants from birth through to 6 months of age. It is also indicated for the active immunisation of individuals aged 60 and above to prevent RSV-caused lower respiratory tract disease.⁷

Abrysvo is administered as a single dose (0.5 mL) in late second or third trimester of pregnancy (24-36 weeks of gestation). For Individuals 60 years of age and older, Abrysvo  is administered as a single dose (0.5 mL). Administration is by intramuscular injection only, preferably in the deltoid region of the upper arm.⁷

From February 3, 2025, Abrysvo will be available on the National Immunisation Program (NIP) for patients between 28 and 36 weeks of gestation.^[19]

Monoclonal antibodies

Prevention in high-risk infants

High-risk infants are those that are more likely to develop complications from RSV. They include premature infants or those with heart or lung problems or those that are immunocompromised (have weakened immune systems).

Palivizumab

Palivizumab is an injectable monoclonal antibody indicated for the prevention of serious lower respiratory tract disease caused by respiratory syncytial virus (RSV) in children at high risk of RSV disease. It is given intramuscularly.⁸ It is directed at a protein in RSV. It has been shown to reduce intensive care unit admission for babies who have been hospitalised for RSV.⁹

Nirsevimab

Nirsevimab is an injectable, long-acting monoclonal antibody that protects against respiratory syncytial virus (RSV) disease for at least 5 months after a single dose. It is indicated for the prevention of RSV lower respiratory tract disease to protect all infants against severe disease during or entering their first RSV season, and young children aged <24 months who are vulnerable to severe disease during their second RSV season.^{10, 11}

Nirsevimab is available for eligible infants through state-funded programs in NSW, QLD and WA.

RSV Treatment

Most cases of RSV are mild and can be treated at home with rest and hydration.^12,13

For babies with bronchiolitis:

• Increase the number of breast feeds through the day or give smaller amounts of formula more frequently through the day
• Saline nasal drops and nasal sprays may help babies with blocked noses

Paracetamol or ibuprofen may be given for fever or pain.

Antibiotics are not helpful for RSV because RSV is a virus and antibiotics work against bacteria.

Take your baby to see a GP or to the emergency department of the hospital if:

• The cough keeps getting worse
• They are taking less than half of their regular feeds
• They have trouble breathing or breathing is fast or irregular
• They look pale or sweaty or change colour when coughing
• You are concerned about your baby for any reason

Babies in hospital with bronchiolitis may be given oxygen. They may be given fluids using a special tube from the nose to the stomach or through a drip that goes into the veins.

More RSV Information

RSV in Young Children

RSV is most common amongst infants that are less than twelve months of age. RSV is a very infectious virus, and most children will get it at least once before they turn two years of age.^14,15

RSV infection creates around 6000 hospitalisations per year with 95% of the hospitalisations reported in children under 5 years of age.^16,17

RSV is associated with increased morbidity amongst preterm infants and babies born with chronic health conditions such as respiratory and/or cardiac complications.¹⁸

RSV in Adults

RSV symptoms in adults and older healthy children are generally mild and mimic the common cold.

Vaccination before the RSV season is the best defence against catching RSV. Currently, there are two TGA approved RSV vaccines available for adults 60 years and older: Arexvy and Abrsyvo.