Understanding RSV (Respiratory Syncytial Virus): Symptoms, Risks, Treatment & Prevention Tips!

Runny nose, cough and fever are the common cold signs. But in babies, older adults and people with certain health conditions, these symptoms can sometimes progress to a more serious respiratory illness.

Respiratory syncytial virus (RSV) is a common virus that infects the nose, throat and lungs. RSV infections are usually mild, but it can cause bronchiolitis and pneumonia, especially in very young infants and the elderly. By the age of two years almost all children have had an RSV infection and they may have more than one RSV infection during life.

What is RSV and How Does it Spread?

RSV - Respiratory syncytial virus. It is one of the most common viral pathogens of respiratory tract infections and can affect people of all ages.

RSV is transmitted through copious respiratory secretions and close contact. You get infected if someone with RSV is:

• Coughing or sneezing at another person
• Proximity to people
• Kisses or touches another person
• Deposits the virus on commonly touched surfaces

RSV can live on hard surfaces for hours. Most infected people can spread the virus for about 3-8 days, but some infants and people with weakened immune systems can spread the virus longer. Symptoms generally develop 4-6 days after infection.

RSV Symptoms: How Does the Infection Begin?

RSV typically starts out like a common cold, so it can be tough to diagnose based on symptoms alone. Respiratory syncytial virus (RSV) might cause:

• Runny Nose
• Nasal congestion
• Cough
• Sneeze Fever
• Reduced appetite
• wheeze
• Tiredness

Symptoms can look different in very young babies. Sometimes the first signs are irritability, decreased activity, poor feeding or breathing problems.

In some people the infection can spread to the lower respiratory tract and cause bronchiolitis or pneumonia.

Warning Signs that Require Medical Attention

Prompt medical assessment is important where:

• Difficulty breathing or fast breathing
• Worsening shortness of breath or wheezing
• Difficulty eating or drinking
• Signs of dehydration
• Unusual fatigue or loss of energy
• Blue or gray lips or skin
• Symptoms getting worse instead of easing up

These warning signs are particularly important for infants and those at higher risk for severe RSV disease.

Who is Most at Risk From RSV?

RSV can infect anyone, but severe illness is more likely in certain groups.

1. Babies and young children

Young infants are particularly vulnerable, especially those born prematurely or those with certain heart, lung or immune conditions.

WHO estimates that RSV causes more than 3.6 million hospitalisations and around 100,000 deaths each year among children under five years worldwide. About half of RSV deaths occur in infants younger than six months.

2. Older adults

RSV is not only a childhood infection. Older adults can also develop severe respiratory illness, especially when conditions such as chronic lung disease, asthma, COPD or heart disease are already present.

3. People with a weakened immune system

People who are immunocompromised and have certain underlying medical conditions also may be at higher risk for severe complications from RSV.

RSV in Adults: More Than Just a Cold?

For most healthy adults, RSV causes a mild respiratory illness that goes away in one to two weeks.

But more serious illness in older adults and people with pre-existing heart or lung conditions including:

• Pneumonitis
• Shortness of breath
• Worsening asthma or COPD
• Hospital admission

That’s why treatment for RSV in adults may need to be done under medical supervision if symptoms get bad or a health problem you already have starts to get worse.

Treatment for RSV: How is it Managed?

There’s no specific antiviral treatment for RSV right now. Most infections resolve on their own, so treatment is aimed at making you feel better and preventing complications such as dehydration.

Treatment for Respiratory Syncytial Virus Include:

• Plenty of fluids
• Relaxation
• Suitable medicines for pain or fever
• Nasal saline or suction for infants if advised
• Monitoring of breathing and oxygen levels in severe illness

Hospitalized patients with severe RSV disease may require oxygen, IV fluids or other supportive care.

RSV is a virus, so antibiotics don't work on it . They can only be prescribed if a healthcare professional identifies a separate bacterial infection.

When should medical advice be sought?

A medical consultation is especially important when breathing becomes difficult, fluid intake drops, dehydration develops or symptoms continue to worsen. Infants with poor feeding or breathing difficulty need prompt evaluation.

Respiratory Syncytial Virus Contact Precautions: How Can Spread be Reduced?

RSV spreads easily by close contact, respiratory secretions and contaminated surfaces. One of the easiest ways to cut down on transmission is by practicing good hygiene.

At home

• Wash hands often with soap and water, or use hand sanitizer.
• Cover coughs and sneezes.
• Clean frequently touched surfaces.
• Avoid close contact with infants when you have respiratory symptoms.
• Avoid kissing babies around the face while unwell.
• Keep an unwell child away from vulnerable family members where practical.

Contact precautions can be used for patients with RSV in health care settings, because the virus can be spread through contaminated hands, equipment and surfaces in the environment. Appropriate protective equipment and hand hygiene help to reduce transmission.

Can RSV be Prevented Through Immunisation?

Yes. RSV prevention has changed significantly in recent years. The World Health Organization currently recognises immunisation options that can protect infants and certain adults from severe RSV disease. These include:

• A maternal RSV vaccine during late pregnancy, allowing antibodies to pass to the baby before birth
• Long-acting monoclonal antibodies, such as nirsevimab, given to infants
• RSV vaccines for older adults and certain adults at increased risk of severe disease

These products are not interchangeable, and recommendations depend on age, pregnancy status, health risk and the country in which they are being used.

What is the RSV Immunisation Position in India?

The Indian position matters for families considering RSV prevention.

The Indian Academy of Pediatrics Advisory Committee on Vaccines and Immunization Practices (IAP-ACVIP) states that the maternal RSV vaccine was not licensed in India at the time of its 2025 recommendations.

IAP-ACVIP also does not recommend universal use of nirsevimab in all infants in India. Instead, it recommends targeted provision of nirsevimab to selected infants at high risk, with appropriate counseling and shared decision-making.

Importantly, nirsevimab itself has received regulatory approval in India. CDSCO documents show approval for prevention of RSV lower respiratory tract disease in neonates and infants entering their first RSV season, as well as certain children up to 24 months who remain vulnerable during their second RSV season.

IAP identifies higher-risk children who may be considered for nirsevimab, including certain premature infants and children under two years with significant congenital heart disease, severe immunocompromise or severe neuromuscular disorders.

This means RSV immunisation in India is not currently a one-size-fits-all programme. Assess eligibility according to the latest Indian recommendations and the child's individual risk.

What About the RSV Vaccine for Adults?

RSV vaccines are available in several countries for older adults and certain adults at increased risk of severe RSV disease.

For example, current CDC guidance recommends a single RSV vaccine dose for adults aged 75 years and older, and for adults aged 50-74 years with an increased risk of severe RSV illness. The vaccine is not currently recommended annually.

These are US recommendations and should not automatically be treated as India's vaccination policy. For adults in India, vaccine choice and eligibility should be based on products licensed and available locally, along with individual medical advice.

What Are the Side Effects of RSV Vaccine?

The phrase “respiratory syncytial virus side effects” refer to complications caused by RSV itself or to reactions following RSV vaccination in the US.

For adult RSV vaccines, commonly reported side effects can include:

• Pain, redness or swelling at the injection site
• Fatigue
• Headache
• Fever
• Nausea
• Muscle or joint pain

These reactions are generally mild. Serious allergic reactions are rare, but require immediate medical attention.

For nirsevimab in infants, IAP reports that the most common adverse reactions in clinical trials were rash and injection-site reactions.

What is Rotavirus? Is it the Same as RSV?

No, rotavirus and RSV are two totally different viruses. Rotavirus is a stomach or a gut infection that can cause vomiting and diarrhea, particularly in very young children.

But RSV affects the respiratory system, which is the nose, throat and lungs. The names may sound alike but the infections, symptoms and vaccines are all different.

RSV Prevention: Simple Steps that Matter

There is no one thing that will stop RSV in its tracks. Good hygiene, limiting exposure and appropriate immunization for those eligible are the best means of preventing infection.

The key steps include:

• Wash your hands regularly.
• Cover your coughs and sneezes.
• Disinfect frequently touched surfaces properly.
• Stay away from people who are sick with respiratory symptoms.
• Protect young infants from unnecessary exposure during illness.
• Stay home when unwell where practical.
• Discuss RSV immunisation with a healthcare professional when an infant, pregnant woman or older adult falls into an eligible group.
  

RSV Treatment Guidelines: When is Medical Care Needed?

Most RSV infections are mild and can be treated at home with supportive care. However, symptoms should not be ignored if there is a concern with breathing, feeding or hydration.

For infants, particular attention should be paid to:

• Breathing
• Feeding
• Hydration
• Activity and alertness

Older adults should get medical care if they develop new or worsening breathing problems, chest discomfort, dizziness or worsening of their underlying heart or lung disease.

The Bottom Line on RSV

RSV is common, but it can become serious in young infants, older adults, and people with certain health conditions. Early medical attention, good hygiene and appropriate prevention can help reduce the risk of severe illness.

For families in India, RSV immunisation should be based on current Indian recommendations, individual risk, and the availability of approved products.

INVC offers RSV immunization in India at home or at INVC’s vaccination centres, helping families understand suitable vaccination options for children and adults, subject to vaccine and service availability.

Frequently Asked Questions

• What are the common RSV symptoms?

Common symptoms include a runny nose, congestion, cough, sneezing, fever, reduced appetite, wheezing, and tiredness. In very young babies irritability, reduced activity, poor feeding or breathing difficulties may be the main features.

• How is RSV treated?

There is no routine antiviral treatment for RSV. Most cases are managed with supportive care such as fluids, rest and symptom relief. In more serious cases, the patient may need to be hospitalized and put on oxygen.

• Is there an RSV vaccine?

Yes. RSV vaccines and long-acting monoclonal antibodies are available for selected groups in different countries. The advice varies for pregnant women, for people with health risks and according to local regulators.

• Is RSV immunisation available for babies in India?

Nirsevimab is approved in India for prevention of RSV lower respiratory tract disease in specified infant and young-child groups. However, IAP-ACVIP does not recommend universal use for all infants and recommends considering it for selected high-risk infants.

• Can RSV happen more than once?

Yes. RSV infection can happen many times during life, though the severity may vary from infection to infection.

• How long is the RSV contagious?

Most people are contagious for about 3 to 8 days, but some infants and people with weakened immune systems can shed the virus for a longer period of time.