Respiratory syncytial virus: Update on infection, treatment, and prevention

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Abstract
Respiratory syncytial virus (RSV) infection, which primarily manifests as bronchiolitis or pneumonia, is the leading cause of lower respiratory tract infection in infants and young children. It is associated with more than 100,000 pediatric hospitalizations each year in the United States. Infants who were premature; have chronic lung disease, congenital heart disease, or immunodeficiency disorders; or have underlying metabolic or neuromuscular disorders are at increased risk for especially severe RSV disease. Treatment of children hospitalized with RSV disease is primarily supportive, with administration of supplemental oxygen and fluid replacement therapy. Bronchodilators may benefit at least a subset of such patients. Antiviral therapy with aerosolized ribavirin is available for high-risk, severely ill patients. Handwashing, cleaning of environmental surfaces, and cohorting in hospital settings may decrease RSV transmission. In children born premature and younger than 1 year of age, and in patients with bronchopulmonary dysplasia younger than 2 years of age, passive protection against severe RSV disease may be achieved through monthly injections of anti-RSV antibody (palivizumab) during winter months. No vaccine is available to provide active immunity against RSV, but live attenuated and subunit cloned surface protein vaccines are in development.

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