Wuhan lab row threatens US-China co-operation in science

In 2004, the US Centers for Disease Control and Prevention signed an agreement with China's National Influenza Center to help China improve its analysis of seasonal strains of flu. The U.S. trained nearly 2,500 Chinese scientists and helped open dozens of laboratories across the country, a collaboration that proved critical in improving the effectiveness of the seasonal flu vaccine from 10 percent to over 50 percent.

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