AMI IMAGES / SCIENCE PHOTO LIBRARY AMI IMAGES / SCIENCE PHOTO LIBRARY
Measles virus particle, coloured transmission electron micrograph (TEM). This virus, from the morbillivirus group of viruses, consists of an RNA (ribonucleic acid) core surrounded by a envelope studded with surface proteins, which are used to attach to and penetrate a host cell. Measles is a highly infectious itchy rash with a fever. It mainly affects children, but one attack usually gives life-long immunity.
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