The scientific community appreciates that the Biden Administration is lifting the arbitrary restrictions on promising biomedical research using human fetal tissue. Fetal tissue is a crucial research tool that has contributed to numerous scientific advances and saved millions of lives. It was critical for the development of vaccines for polio, rubella, measles, chickenpox, and rabies. It remains essential for creating models of the human immune system for studying viral infections from HIV, Zika, coronavirus, and other viruses.