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On February 10th, the Chinese Centre for Disease Control and Prevention (CDC) held a Q&A to raise awareness on the prevention, symptoms and treatment of human respiratory syncytial virus (HRSV) infection.

False-color artistic rendering of RSV
False-colour artistic rendering of RSV

Respiratory syncytial virus (RSV), also called human respiratory syncytial virus (hRSV) and human orthopneumovirus, is a common, contagious virus that causes infections of the respiratory tract. It is the most common cause of bronchiolitis and pneumonia in children younger than 1 year of age.

RSV is the single most common cause of respiratory hospitalization in infants, and reinfection remains common in later life: it is a notable pathogen in all age groups. Infection rates are typically higher during the cold winter months, causing bronchiolitis in infants, common colds in adults, and more serious respiratory illnesses such as pneumonia in the elderly and immunocompromised.

RSV can cause outbreaks both in the community and in hospital settings. Following initial infection via the eyes or nose, the virus infects the epithelial cells of the upper and lower airway, causing inflammation, cell damage, and airway obstruction.

The main prevention measures include hand-washing and avoiding close contact with infected individuals. Currently, there is no vaccine against RSV.

Signs and symptoms:

RSV-is-a-common,-contagious-virus-that-causes-infections-of-the-respiratory-tract
RSV is a common, contagious virus that causes infections of the respiratory tract

RSV infection can present with a wide variety of signs and symptoms that range from mild upper respiratory tract infections (URTI) to severe and potentially life-threatening lower respiratory tract infections (LRTI) requiring hospitalization and mechanical ventilation.

Children:

Most children will experience at least one RSV infection by age 2. Most childhood RSV infections are fairly self-limited with typical upper respiratory tract signs and symptoms, such as nasal congestion, runny nose, cough, and low-grade fever. Inflammation of the nasal mucosa (rhinitis) and throat (pharyngitis), as well as redness of the eyes (conjunctival infection), may be seen on exam.

X-ray of a child with RSV bronchiolitis showing the typical bilateral perihilar fullness
X-ray of a child with RSV bronchiolitis showing the typical bilateral perihilar fullness

Approximately 15–50% of children will go on to develop more serious lower respiratory tracts infections, such as bronchiolitis, viral pneumonia, or croup. Infants are at the highest risk of disease progression.

Adults:

Reinfection with RSV remains common throughout life. Reinfection in adulthood often produces only mild to moderate symptoms indistinguishable from the common cold or sinus infection. Only about 25% of infected adults will progress to significant lower respiratory tract infection, such as bronchitis or tracheobronchitis.

Take steps to relieve symptoms:

Manage fever and pain with over-the-counter fever reducers and pain relievers, such as acetaminophen or ibuprofen. (Never give aspirin to children.)

Drink enough fluids. It is important for people with RSV infection to drink enough fluids to prevent dehydration (loss of body fluids).

Talk to your healthcare provider before giving your child non-prescription cold medicines. Some medicines contain ingredients that are not good for children.

Treatment:

Treatment for RSV infection is focused primarily on supportive care. This may include monitoring a patient’s breathing or using suction to remove secretions from the upper airway. Supplemental oxygen may also be delivered though a nasal cannula or face mask in order to improve airflow. In severe cases of respiratory failure, intubation and mechanical ventilation may be required to support breathing. If signs of dehydration are present, fluids may also be given orally or through an IV.

Antibiotic therapy is not appropriate for treatment of RSV-related bronchiolitis or viral pneumonia. Antibiotics target bacterial pathogens, not viral pathogens such as RSV. However, antibiotics may be considered if there is clear evidence that a secondary bacterial infection has developed. Ear infections may also develop in a small number of infants with RSV bronchiolitis, in which case oral antibiotics may sometimes be used.

Related article: Looking for an international pre-school in Haikou?

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