2005 CDC 宣布他们们成功的重新建造了1918的流感病毒.

2008 他们购买了足够给全国每一个人都打的H1N1疫苗.

2009 10月底他们宣布全国紧急状态. 说是有猪流感流行. 后来数据显示那一年死于流感的人只是往年的1/3.

你可以去CDC 的网战自己看.

http://www.cdc.gov/flu/about/qa/1918flupandemic.htm

"CDC researchers and their colleagues have successfully reconstructed the influenza virus that caused the 1918-19 flu pandemic, which killed as many as 50 million people worldwide. A report of their work, "Characterization of the Reconstructed 1918 Spanish Influenza Pandemic Virus," was published in the October 7 issue of Science. The work is a collaboration among scientists from CDC, Mount Sinai School of Medicine, the Armed Forces Institute of Pathology, and Southeast Poultry Research Laboratory. The following questions and answers describe this important research and related issues.

Background on the Research

What research does the Science article describe? Why is it important?

This report describes the successful reconstruction of the influenza A (H1N1) virus responsible for the 1918 "Spanish flu" pandemic and provides novel information about the properties that contributed to its exceptional virulence. This information is critical to evaluating the effectiveness of current and future public health interventions, which could be used in the event that a 1918-like strain reemerges, either naturally or through deliberate release. The knowledge from this work may also shed light on the pathogenesis of contemporary human influenza viruses with pandemic potential. The natural emergence of another pandemic virus is considered highly likely by many experts, and therefore novel insights into pathogenic mechanisms could contribute to the development of prophylactic and therapeutic interventions needed to control pandemic viruses."

注意看下面:

Page last reviewed: November 2, 2005

So can you connect the dots yourself?