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	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

To the Editor: Although a large number of health care workers have been known to be infected with severe acute respiratory syndrome (SARS), the incidence and the modes of infection within this population have not been completely described.

Methods

We examined SARS infection rates among health care workers in the First Hospital of Peking University, Beijing, China, a general hospital with 1147 beds, 29 clinical departments, and more than 2000 staff members. A total of 322 patients diagnosed with SARS were admitted to the hospital from March 24 through May 13, 2003. Diagnostic criteria for SARS were those of the World Health Organization¹; IgG tests with a SARS-specific enzyme-linked immunosorbent assay found that 86% of these patients were positive for SARS during the third week of onset and 99% were positive during the fifth week. No other virological test was performed on these patients.

There were few patients with SARS . . . [Full Text of this Article]

Liuyi Li, MS; Suhua Cheng, BS
The First Hospital
Peking University

Jiang Gu, MD, PhD
School of Basic Medical Sciences
Peking University
Beijing, China

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