Category A-A类-甲类
属于A类的传染性物质以运输过程中感染风险最高的形式运输。它们能够在其他健康的个体或动物中造成永久性残疾、危及生命或致命的疾病。A 类传染性物质的正确运输名称酌情为：
UN2814 – 感染性物质，影响人类
UN2900 – 传染性物质，仅影响动物
Infectious substances included in Category A are transported in a form that poses the highest risk of infection during transportation. They are capable of causing permanent disability, life-threatening or fatal disease in otherwise healthy individuals or animals. The proper shipping name of a Category A infectious substance is, as appropriate:
UN2814 – INFECTIOUS SUBSTANCE, AFFECTING HUMANS
UN2900 – INFECTIOUS SUBSTANCE, AFFECTING ANIMALS only
