来自《耶鲁大学开放课程：1600年后西方社会的流行病 第6集 第6集》
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droplets breathed out in face-to-face contact在面对面接触时 患者会呼出 -
with a susceptible person部分的体液微粒 -
and inhaled by that person.进而由另一人吸入 -
Normally the spread was in the context of intense contact通常情况下 其传染是以密切接触为前提的 -
over a period of time; that is, a family member,在很长一段时间内 这仅限于 家庭成员 -
or someone on a hospital ward, in an enclosed workplace--病房成员或者是密集办公场所 -
an office, a factory, a mine--比如办公室 工厂 矿井 -
a school classroom, an army barrack, a refugee camp.教室 军营和难民营 -
And it's most easily transmitted病毒也极容易在奈希尔 -
in dry, cool seasons.干燥 凉爽的季节传播 -
That's the primary mode of transmission.刚才我讲的是传染的主要模式 -
There are two more, however,然而 还有另外两种