在美国，国家医保（National Institutes of Health ，NIH）每年要花 370亿多美元用于生物医学研究，特别是在对私人部门来说风险过高的领域。
In the United States, the National Institutes of Health (NIH) spends more than $37 billion on biomedical research every year, particularly in areas that are too risky for the private sector.