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Respiratory syncytial virus (RSV), a negative stranded RNA virus in the family Paramyxoviridae, is believed to be the most important viral pathogen causing serious lower respiratory tract disease among infants and young children worldwide.The Centers for Disease Control and Prevention consider RSV to be the "most common cause of bronchiolitis and pneumonia in children under 1 year of age in the United States".In addition, RSV can cause severe illness in the elderly people and those adults with cardiopulmonary diseases or immunocompromised.Globally, disease burden associated RSV infections is estimated at 64 million cases and 200,000 deaths every year.Since RSV is extremely contagious and no effective vaccine is available at present,there is a critical need for the development of novel methods to diagnose RSV infection.