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The alerts , by definition , measure a new virus 's spread , not its lethality .

警戒，从定义上来说，是衡量一个新的病毒的传播，而不是其致命性。

The lethality of venom depends on a combination of its potency , the volume delivered and the size of the victim .

毒液的致命性取决于威力的组合，即喷出毒液量和受害者的大小。

Having had close calls with both sars and h5n1 , the world is watching and waiting to see if this new virus possesses the combination of infectiousness and lethality that made those two diseases such a worry .

在侥幸逃过sars和h5n1后，全世界正在密切注视着这种新病毒是否结合了之前两种病毒的高传染性和致命性，正是这两种特性使得这两个疾病令人们担心不已。

The lethality can vary from country to country , depending on viral mutations , how prepared each country is , what other diseases its population has , and other factors .

致命性是因国而异的，取决于病毒的突变，每个国家是如何准备的，其他疾病的人口数量有多少，和其他因素。

Psychotherapy is generally the treatment of choice , but as the severity of depression , chronicity of depression , worsening of patient functioning and increasing lethality develops , medications may be a more prominent choice .

心理咨询通常是治疗的一种选择，但是随着抑郁严重度、抑郁慢性化、患者的机能降低和增加致命性的发生，药物可能是更主要的选择。