Throat and nose membranes hurt by dry air allow cold viruses to enter more easily. It is important to carry out sensible counter plans against the cold with heaters and against the dryness with humidifiers.
[汉他病毒 / 漢他病毒, hàn tā bìng dúㄏㄢˋ ㄊㄚ ㄅㄧㄥˋ ㄉㄨˊ] Hantavirus (a family deadly rodent-borne viruses) responsible for hemorrhagic fever with renal syndrome or cardiopulmonary syndrome