Respiratory Syncytial Virus Infections

What is respiratory syncytial virus (RSV)?

From: MedlinePlus, National Library of Medicine

Respiratory syncytial virus, or RSV, is a common respiratory virus. It usually causes mild, cold-like symptoms. But it can cause serious lung infections, especially in infants, older adults, and people with serious medical problems.

How is respiratory syncytial virus (RSV) spread?

From: MedlinePlus, National Library of Medicine

RSV spreads from person to person through:

• The air by coughing and sneezing
• Direct contact, such as kissing the face of a child who has RSV
• Touching an object or surface with the virus on it, then touching your mouth, nose, or eyes before washing your hands

People who have an RSV infection are usually contagious for 3 to 8 days. But sometimes infants and people with weakened immune systems can continue to spread the virus for as long as 4 weeks.

Who is at risk for respiratory syncytial virus (RSV) infections?

From: MedlinePlus, National Library of Medicine

RSV can affect people of all ages. But it is very common in small children; nearly all children become infected with RSV by age 2. In the United States, RSV infections usually occur during RSV season, which is usually fall through spring.

Certain people are at higher risk of having a severe RSV infection:

• Infants
• Older adults, especially those ages 65 and older
• People with chronic medical conditions such as heart or lung disease
• People with weakened immune systems

What are the symptoms of respiratory syncytial virus (RSV) infections?

From: MedlinePlus, National Library of Medicine

The symptoms of RSV infection usually start about 4 to 6 days after infection. They include:

• Runny nose
• Decrease in appetite
• Cough
• Sneezing
• Fever
• Wheezing

These symptoms usually appear in stages instead of all at once. In very young infants, the only symptoms may be irritability, decreased activity, and trouble breathing.

RSV can also cause more severe infections, especially in people at high risk. These infections include bronchiolitis, an inflammation of the small airways in the lung, and pneumonia, an infection of the lungs.

How are respiratory syncytial virus (RSV) infections diagnosed?

From: MedlinePlus, National Library of Medicine

Your health care provider may use many tools to make a diagnosis:

• A medical history, including asking about symptoms.
• A physical exam.
• A lab test of nasal fluid or another respiratory specimen to check for RSV. This is usually done for people with severe infection.
• Tests to check for complications in people with severe infection. The tests may include a chest x-ray and blood and urine tests.

What are the treatments for respiratory syncytial virus (RSV) infections?

From: MedlinePlus, National Library of Medicine

There is no specific treatment for RSV infection. Most infections go away on their own in a week or two. Over-the-counter pain relievers can help with the fever and pain. However, do not give aspirin to children. And do not give cough medicine to children under four. It is also important to get enough fluids to prevent dehydration.

Some people with severe infection may need to be hospitalized. There, they might get oxygen, a breathing tube, or a ventilator.

Can respiratory syncytial virus (RSV) infections be prevented?

From: MedlinePlus, National Library of Medicine

There are some vaccines to protect against RSV illness. Two of them are for people ages 60 and older. If you are in this age group, talk to your provider about whether an RSV vaccine would be right for you.

If you are pregnant, there is a vaccine that is available to give between 32 and 36 weeks of pregnancy. It helps protect their newborn babies from RSV illness for the first 6 months of life.

There are two medicines to help prevent severe RSV illness in babies and young children. These medicines may help prevent severe RSV illness, but they can't cure or treat children who already have RSV. And they cannot prevent an RSV infection. Both medicines are given by injections (shots).

One medicine is given to infants who are younger than 8 months during their first RSV season. This includes infants who are born during RSV season. This medicine may also be given to some children between the ages of 8 and 19 months who are at high risk for severe RSV illness. For example, they might be at high risk because they:

The other medicine is given monthly during RSV season. It is for children under 24 months of age who are at high risk for severe RSV illness.

There are also some steps you can take to lower your risk of getting or spreading an RSV infection, including:

• Were born prematurely
• Have congenital heart disease
• Have chronic lung disease
• Have a weakened immune system
• Washing your hands often with soap and water for at least 20 seconds
• Avoiding touching your face, nose, or mouth with unwashed hands
• Avoiding close contact, such as kissing, shaking hands, and sharing cups and eating utensils, with others if you are sick or they are sick
• Cleaning and disinfecting surfaces that you frequently touch
• Covering coughs and sneezes with a tissue. Then throw away the tissue and wash your hands
• Staying home when sick

Which doctor should you see?

The suggested department for discussing Respiratory Syncytial Virus Infections is Pulmonology, with a pulmonologist / chest physician as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• What is the likely explanation for the breathing symptoms?
• Would a breathing test or another investigation change management?
• If symptoms worsen, what written action plan should be followed?

Treatment discussions and follow-up

Where the source describes treatments, these are an overview of possible care, not a prescription for an individual. Ask which option applies to the confirmed diagnosis, what benefit is expected, what adverse effects to watch for and how progress will be assessed. Availability, approvals and local practice can differ from the country described in the source.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.