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What is RSV (Respiratory Syncytial Virus)?

Published in Respiratory Viruses 3 mins read

RSV, or Respiratory Syncytial Virus (sin-SISH-uhl), is a common and highly contagious respiratory virus that infects the nose, throat, lungs, and breathing passages. It is a leading cause of respiratory illness in infants and young children, though it can affect people of all ages.

Understanding RSV

Respiratory Syncytial Virus is a widespread pathogen responsible for infections of the respiratory tract. While often causing mild, cold-like symptoms, it can lead to more serious conditions like bronchiolitis (inflammation of the small airways in the lungs) and pneumonia, especially in vulnerable populations.

How Does RSV Spread?

RSV is primarily transmitted through droplets expelled from an infected person when they cough, sneeze, or kiss. These viral particles can travel through the air and land on surfaces, allowing the virus to spread easily through:

  • Direct contact: Touching an infected person, such as kissing a baby with RSV.
  • Indirect contact: Touching a surface contaminated with the virus (e.g., doorknobs, toys) and then touching your eyes, nose, or mouth.
  • Airborne droplets: Inhaling droplets released into the air from a cough or sneeze.

Key Characteristics of RSV

Characteristic Description
Virus Type A common respiratory virus that infects the respiratory system.
Affected Areas Primarily impacts the nose, throat, lungs, and breathing passages.
Transmission Spreads efficiently through droplets from an infected person, typically via coughing, sneezing, or kissing.
Symptoms Often mild, resembling a common cold (runny nose, cough, sneezing), but can progress to wheezing, fever, and difficulty breathing.
Risk Groups Infants (especially premature babies), young children, older adults, and individuals with compromised immune systems or underlying heart/lung conditions.

Symptoms of RSV Infection

Symptoms typically appear within 4 to 6 days after exposure and can vary in severity. Common symptoms include:

  • Runny nose
  • Decreased appetite
  • Coughing
  • Sneezing
  • Fever (often low-grade)
  • Wheezing

In severe cases, especially in infants and young children, RSV can cause:

  • Rapid or troubled breathing
  • Shallow breathing
  • Flaring of the nostrils or head bobbing with breathing
  • Bluish color around the lips or fingernails (due to lack of oxygen)

Prevention and Management

While there's no specific cure for RSV, supportive care helps manage symptoms. Prevention is key, especially for high-risk individuals.

  • Prevention Strategies:
    • Frequent and thorough handwashing with soap and water for at least 20 seconds.
    • Avoiding close contact with sick people, especially if you are in a high-risk group or caring for an infant.
    • Cleaning and disinfecting frequently touched surfaces.
    • Covering coughs and sneezes with a tissue or your elbow.
    • Avoiding touching your face (eyes, nose, mouth).
    • Limiting exposure for young children to crowded settings during RSV season.
  • Medical Interventions:
    • Antiviral medications are not routinely used for RSV but may be considered for severe cases.
    • For high-risk infants, a monoclonal antibody immunization (palivizumab) can provide protection against severe RSV disease.
    • Vaccines for older adults and pregnant individuals are now available to prevent severe RSV disease.

For more detailed information on RSV, you can visit reputable health organization websites such as the Centers for Disease Control and Prevention (CDC) or the National Foundation for Infectious Diseases (NFID).