As a safeguard human health and life products, drugs has a vital role for the prevention and control of public health in the crisis. Frequent large-scale events such as SARS and avian flu epidemic diseases have make the public health problems be faced more and more attention by the international community. Prevention and treatment of epidemic diseases, the supply of drugs can be timely and adequate relief of the key issues of public health crisis. Currently, drug patents in the public interest so requires a...