This legislation aims to prevent the use of U.S. taxpayer funds for animal experimentation in certain foreign countries deemed adversarial. It specifically prohibits the Secretary of Health and Human Services from directly conducting or indirectly supporting biomedical research involving vertebrate animal testing in these nations. The bill explicitly names the People's Republic of China (including Hong Kong), the Islamic Republic of Iran , the Democratic People's Republic of Korea , and the Russian Federation as countries where such funding is forbidden. Furthermore, the Secretary of HHS, in consultation with the Secretaries of State and Defense, can designate other foreign countries as "countries of concern," thereby extending the prohibition to them. Any such designation requires a detailed report to be submitted to appropriate congressional committees within 60 days, explaining the reasoning behind the decision.