CENTRE FOR INFECTIONS / PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY CENTRE FOR INFECTIONS / PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
SARS virus. Coloured transmission electron micrograph (TEM) of SARS (severe acute respiratory syndrome) virus particles. SARS is an often fatal lung disease that first appeared in China in 2002. It is caused by a coronavirus, named for the corona (crown) of surface proteins (blue dots around the yellow and blue circles) that are used to penetrate a host cell. Once inside the cell, the virus particles (virions) use the cell's machinery to make more copies of themselves. Magnification: x102,000 when printed 10 centimetres wide.
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