DR KLAUS BOLLER / SCIENCE PHOTO LIBRARY DR KLAUS BOLLER / SCIENCE PHOTO LIBRARY
SARS virus particle, coloured transmission electron micrograph (TEM). Severe acute respiratory syndrome (SARS) is an often fatal lung disease that first appeared in China in 2002. The SARS virus is a coronavirus. Coronaviruses are named for their corona (crown) of surface proteins (dark green) that are used to attach to and penetrate their host cells. Once inside a cell, the virus particles use the cell machinery to make more copies of themselves.
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