In the case of vaccines for HIV/AIDS, for example, substantial research and development is under way as a result of rich-country market demand, but not in proportion to global need or addressed to the specific disease conditions of the poor countries.
例如，艾滋病毒/艾滋病疫苗，由于富国市场的需求，目前正进行大量的研发，但与全球需求或针对解决穷国中疾病的具体情况不相称。