AMI IMAGES / SCIENCE PHOTO LIBRARY AMI IMAGES / SCIENCE PHOTO LIBRARY
Respiratory syncytial virus (RSV) particle, coloured transmission electron micrograph (TEM). Each virion consists of an RNA (ribonucleic acid) core enclosed in a protein coat, or capsid (yellow), within a phospholipid envelope (orange). This pneumovirus, a type of paramyxovirus, is a major cause of respiratory tract infections in humans. It is the most common cause of bronchiolitis and pneumonia among infants.
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