在SARS流行期间各阶段，新发病例有明确接触史的比例呈逐渐下降趋势，整个过程共有62 。 69%的病例无明确接触史。
The close contacting rate decreased with the epidemic period and 62.69% SARS cases had no previous close contacting history.
摘要报告一无明显外伤史之眼球铁质沈着症病例。
Report a case of siderosis bulbi without definite ocular injury history.
所有病例均无明显石棉接触史。
All the cases had no evidently history of exposure to asbestos.
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