RSV (Respiratory Syncytial Virus) Vaccine

Vaccination offers a proactive way to reduce the risk of severe RSV-related complications, especially for those who are more vulnerable. By strengthening the body’s immune response before exposure occurs, the RSV vaccine supports respiratory health and helps lower the likelihood of serious illness during peak viral seasons.

What is RSV (Respiratory Syncytial Virus)?

Respiratory Syncytial Virus (RSV) is a common virus that infects the respiratory tract, including the nose, throat and lungs. It spreads easily from person to person through respiratory droplets produced when an infected individual coughs or sneezes. The virus can also be transmitted through close contact, such as touching contaminated surfaces and then touching the face.

In many healthy adults, RSV causes mild, cold-like symptoms that resolve on their own. However, in older adults, infants and individuals with underlying health conditions, RSV can progress to more serious lower respiratory infections, including bronchitis and pneumonia.

What symptoms can RSV cause?

RSV symptoms can range from mild upper respiratory illness to more serious lower respiratory infections, depending on age and overall health. In healthy adults, the infection often resembles a common cold. In higher-risk individuals, symptoms may become more severe and involve the lungs.

• Mild cold-like symptoms — runny nose, sore throat, cough, sneezing and mild fever
• Fatigue and body aches — general tiredness and discomfort during the infection
• Persistent cough or wheezing — signs that the lower airways may be affected
• Shortness of breath — difficulty breathing, particularly in older adults or those with lung conditions
• Bronchitis or pneumonia — in more serious cases, RSV can lead to lower respiratory tract infections requiring medical care

Medical attention should be sought if breathing becomes difficult, symptoms worsen or recovery is prolonged.

Who is at higher risk of severe RSV infection?

While RSV often causes mild illness in healthy adults, certain groups are more vulnerable to developing severe respiratory complications.

• Older adults — age-related changes in immunity increase the risk of severe lower respiratory infection and complications.
• Infants and very young children — developing immune systems and smaller airways make them more susceptible to breathing difficulties.
• Individuals with chronic lung or heart disease — conditions such as chronic obstructive pulmonary disease (COPD) or heart disease can worsen the impact of RSV infection.
• People with weakened immune systems — medical conditions or treatments that reduce immune function may increase the likelihood of severe illness.

For these groups, preventive measures such as vaccination can play an important role in reducing the risk of serious infection.

What is the RSV vaccine?

The RSV vaccine is a preventive vaccine designed to help protect against serious illness caused by Respiratory Syncytial Virus. It works by preparing the immune system to recognise and respond to the virus before infection occurs. The vaccine does not treat an existing RSV infection, but it helps reduce the risk of severe respiratory complications, particularly in individuals who are more vulnerable to serious illness.

How does the RSV vaccine work?

The RSV vaccine works by training the immune system to recognise key parts of the virus before exposure occurs. After vaccination, the body produces protective antibodies that can quickly identify and respond to RSV if infection happens in the future. This early immune response helps reduce the severity of illness and lowers the risk of serious complications affecting the lungs and airways.

Who should consider the RSV vaccine?

RSV vaccination may be recommended for individuals who are at higher risk of developing serious respiratory complications if infected. Age, underlying health conditions and immune status can increase vulnerability to severe illness.

• Older adults — particularly those aged 60 and above, as the risk of severe lower respiratory infection increases with age.
• Individuals with chronic lung disease — including asthma or chronic obstructive pulmonary disease (COPD), where RSV may worsen respiratory symptoms.
• Individuals with chronic heart conditions — respiratory infections can place additional strain on the heart and increase complications.
• People with weakened immune systems — certain medical conditions or treatments may reduce the body’s ability to fight infection.
• Adults with other underlying health conditions — where RSV infection may lead to more serious or prolonged illness.

How effective is the RSV vaccine?

Clinical studies have shown that RSV vaccines are effective in reducing the risk of severe lower respiratory tract disease caused by RSV, particularly in older adults. Vaccination helps lower the likelihood of complications such as pneumonia and hospitalisation. While no vaccine provides complete protection against infection, RSV vaccination significantly reduces the risk of serious illness in higher-risk groups.

How long does RSV vaccine protection last?

Current evidence suggests that the RSV vaccine provides protection through at least one RSV season, with ongoing studies evaluating longer-term immunity. The duration of protection may vary depending on individual health factors. A doctor can advise on current recommendations and whether additional doses may be needed in the future.

What are the possible side effects of the RSV vaccine?

Side effects are generally mild and temporary, occurring as part of the body’s normal immune response to the vaccine.

• Injection site reactions — pain, redness or swelling at the site of injection
• Fatigue — temporary tiredness following vaccination
• Headache — mild discomfort that settles on its own
• Muscle aches — short-term muscle soreness
• Mild fever — a low-grade rise in temperature as the immune system responds

Medical advice should be sought if symptoms persist, worsen or if any unusual reactions occur after vaccination.

Who should not receive the RSV vaccine?

The RSV vaccine may not be suitable for everyone. Certain medical conditions or circumstances may require postponement or further assessment before vaccination.

• Individuals with a history of severe allergic reaction — anyone who has previously experienced a serious allergic reaction to an RSV vaccine or any of its components should not receive the vaccine without specialist advice.
• Individuals with an acute febrile illness — vaccination may be postponed in those who are currently unwell with a significant fever until recovery.
• Pregnant individuals (depending on vaccine type and indication) — suitability should be assessed based on current clinical guidance and individual circumstances.

A medical consultation helps determine whether RSV vaccination is appropriate and ensures it is administered safely.

RSV vaccination during pregnancy

RSV vaccination may be recommended during pregnancy to help protect newborns from severe RSV infection in the first months of life. The vaccine is typically offered during the third trimester, usually from around 28 weeks of pregnancy. Receiving the vaccine during this period allows protective antibodies to pass to the baby before birth.

Vaccination can still be given later in pregnancy if needed, depending on individual circumstances and clinical advice. Pregnant individuals who have not yet been offered the RSV vaccine should speak with their obstetrician to discuss suitability and timing.

Can the RSV vaccine be given with other vaccines?

The RSV vaccine may be administered alongside other routine vaccines, including the influenza, COVID-19 or pneumococcal vaccines, depending on individual health status and clinical guidance. In some cases, vaccines can be given during the same visit, while in others they may be spaced apart. A doctor will assess timing and suitability to ensure vaccination is carried out safely and effectively.

How is the RSV vaccine administered?

RSV vaccination is carried out during a clinic visit under medical supervision to ensure safety and suitability. The process is straightforward and typically completed within a short appointment.

• Medical consultation — a brief review of medical history and current health status is conducted to confirm eligibility for vaccination.
• Vaccine administration — the RSV vaccine is given as an injection, usually into the upper arm.
• Observation period — a short monitoring period may follow to check for any immediate reactions.

Most individuals can resume their usual activities shortly after the appointment unless otherwise advised by the doctor.

How can you prepare for an RSV vaccination appointment?

Preparing for your RSV vaccination helps ensure the process is smooth, safe and appropriate for your health needs. No special preparation is required, but a few simple steps can make your visit more comfortable and efficient.

• Confirm eligibility — RSV vaccination is typically recommended for older adults, individuals at higher medical risk or pregnant individuals within the recommended gestational period. A doctor can clarify suitability.
• Schedule at the right time — vaccination is often advised before the peak RSV season to provide protection when respiratory infections are more common.
• Share your medical history — inform the doctor of any previous severe allergic reactions, especially to vaccines, as well as current medical conditions or pregnancy status.
• Attend the appointment well — if you are unwell with a high fever, vaccination may need to be postponed until recovery.
• Plan for brief observation — after vaccination, you may be asked to remain in the clinic for a short period to monitor for rare immediate reactions.

A consultation allows the doctor to address any concerns and ensure RSV vaccination is given safely and appropriately.

Summary

RSV is a common respiratory virus that can cause mild cold-like symptoms in healthy individuals but may lead to serious lower respiratory complications in older adults, pregnant individuals and those with underlying medical conditions. RSV vaccination offers a preventive approach to reduce the risk of severe illness, hospitalisation and complications, particularly in higher-risk groups. Medical assessment helps determine suitability and ensures vaccination is given safely and at the appropriate time.

If you would like to find out whether RSV vaccination is suitable for you, schedule a consultation with A1 Medical to receive personalised advice and discuss your vaccination options.