Dr. William Schaffner, an infectious disease expert at Vanderbilt University, said that, right now, some of the safest eggs available to Americans are from small farms.
供职于范德堡大学的传染病学博士威廉•沙夫纳认为，现在美国市场上部分安全鸡蛋产于小型农场。
Polyoma virus: Minute infectious agent normally present in extremely small amounts in wild mice without causing obvious ill effects.
多瘤病毒：存在于野鼠身上、数量极少、致病力不强的一种感染性小病原体。
Any of various bacterial products that, introduced in small amounts, protect an organism from an infection or a disease without killing the infectious agent.
任一种细菌产物，数量较小，在不杀死传染作用物的情况下保护微生物不受传染或疾病侵扰。
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