Walker McKnight had never given much thought to vaping.

沃克·麦克奈特从来没想过吸电子烟。

" He never went out, so he didn't think he would catch it, " said his sister, Karen McKnight.

他的妹妹凯伦·麦克奈特说，" 他从来没有出去过，所以他认为自己不会感染。"

The only warning 44-year-old Francisco McKnight had was what he described as " the terrifying sound of the tornado approaching" .

44岁的弗朗西斯科·麦克奈特说他收到的唯一的警告就是他所说的“龙卷风逼近的可怕声音”。