Overview of Respiratory Syncytial Virus (RSV) Infection

Respiratory Syncytial Virus (RSV) is a highly contagious virus that affects the respiratory tract. It is especially common in infants, toddlers, and older adults but can affect individuals of all ages. RSV is one of the leading causes of bronchiolitis and pneumonia in babies under 1 year of age. While most infections are mild and mimic cold-like symptoms, RSV can sometimes lead to severe respiratory complications, particularly in vulnerable populations such as premature infants, people with chronic lung or heart disease, and those with weakened immune systems. Understanding the signs, transmission and treatment of RSV is essential for timely care and prevention.

Types of Respiratory Syncytial Virus (RSV) Infection

1. RSV-A and RSV-B: The two main subtypes of the virus, both capable of causing similar illnesses but may vary in severity from year to year.

2. Community-acquired RSV: Spread through close contact, often in schools, daycares, and family settings.

3. Nosocomial RSV: Acquired during a hospital stay, especially in neonatal or pediatric wards.

4. Recurrent RSV: Reinfections are common; the virus doesn’t provide long-lasting immunity.

Symptoms of Respiratory Syncytial Virus (RSV) Infection

Runny nose, nasal congestion, and sneezing

Mild to severe cough with wheezing

Fever, especially in infants and toddlers

Decreased appetite or difficulty feeding in babies

Shortness of breath or fast breathing

Bluish lips or fingernails in severe cases

Apnea (pauses in breathing) in very young infants

Irritability or fatigue in children

Causes of Respiratory Syncytial Virus (RSV) Infection

RSV is caused by a respiratory syncytial virus, part of the paramyxovirus family.

Spreads through droplets when an infected person coughs or sneezes.

Contact with contaminated surfaces like toys, doorknobs, or shared utensils.

Close contact, such as kissing an infected child or adult.

Poor ventilation and crowded living spaces increase risk.

Complications in Respiratory Syncytial Virus (RSV) Infection

Bronchiolitis (inflammation of the small airways)

Pneumonia, especially in infants and elderly

Hospitalisation due to breathing difficulty

Otitis media (middle ear infection)

Asthma development later in childhood

Dehydration due to feeding issues in infants

Worsening of chronic lung or heart diseases

Secondary bacterial infections

Risk Factors of Respiratory Syncytial Virus (RSV) Infection

Premature birth or low birth weight

Infants under 6 months of age

Children with congenital heart or lung conditions

Weakened immune systems for example due to cancer treatment

Older adults, especially those with chronic illnesses

Attending daycare or having school-aged siblings

Exposure to tobacco smoke at home

Living in crowded conditions

Preventions of Respiratory Syncytial Virus (RSV) Infection

Regular handwashing and sanitizing surfaces

Avoid close contact with sick individuals

Do not share cups, bottles or utensils

Keep infants away from crowded places during RSV season

Breastfeeding to boost baby’s immunity

Flu and COVID-19 vaccinations to avoid co-infections

Palivizumab shots for high-risk infants (preventive antibody)

Using masks and maintaining hygiene in healthcare settings