Medical authorities were baffled, both as to its causes and its virulence.

医疗当局对其病因及有多致命都还不甚了解。

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The rapid spread of the disease is alarming the medical authorities.

这种疾病的迅速蔓延使医疗当局感到忧虑不安.

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Medical authorities are also stocking up on antibiotics 20 that can be used to treat anthrax.

医疗部门也在收集用于治疗炭疽热的抗菌素.

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