Tamiflu does not kill but prevents H1N1 from further proliferation till the virus limits itself in about 1-2 weeks (its natural cycle). H1N1, like other Influenza A viruses, only infects the upper respiratory tract and proliferates (only) there. The only portals of entry are the nostrils and mouth/ throat. In a global epidemic of this nature, it's almost impossible not coming into contact with H1N1 in spite of all precautions.
流感疫苗不是用来杀死H1N1病毒，它只能抑制病毒在其1-2周的自然生存周期中繁衍，H1N1跟其他Ａ型流感的病毒一样，感染部位只限于上呼吸道，并在那繁殖，它的唯一入侵途径是口鼻喉，这种全球性的流感，几乎无人能置身事外
