Thin section electron microscopy of infected cell culture.

Sin Nombré virus, the cause of Hantavirus pulmonary syndrome in southwestern US. This virus was discovered in 1993 when there was a cluster of cases in one place at one time. Magnification approximately. x45,000.

Micrograph from Cynthia Goldsmith, Division of Viral and Rickettsial Diseases, Infectious Disease Pathology Branch, Centers for Disease Control and Prevention.

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