Human-Animal Chimera Prohibition Act of 2025

HR 2161 prohibits the creation, transfer, or transport of specific human-animal biological hybrids (called "prohibited human-animal chimeras") as defined in the bill. It directly affects researchers and institutions conducting experiments that would create these hybrids, such as mixing human and nonhuman cells in embryos or engineering animals with human brains or facial features. Key provisions ban activities like transferring human embryos into nonhuman wombs or nonhuman embryos into human wombs, with penalties including up to 10 years in prison or $1 million civil fines for commercial violations. The bill explicitly excludes standard research involving transgenic animals with human genes or human organ transplants into animals, focusing only on the most extreme hybrid configurations.