2025 has been the most challenging year in the efforts to fight HIV since at least the advent of antiretroviral therapy. In a report on “Overcoming disruption, transforming the AIDS response,” released last week ahead of World AIDS Day on Dec. 1, the Joint United Nations Program on HIV/AIDS (UNAIDS) described “a global system in shock” by sharply reduced funding from the U.S. and other wealthy nations. Scientifically, for now, progress is ongoing.

A 24‑week pregnant woman fears for her unborn baby, who is developing with a sacrococcygeal teratoma so large and vascularized that it nearly surpasses the size of the fetus itself. Faced with this threat, surgeons operate inside the uterus in an open procedure that partially exposes the baby to remove the tumor and give the baby a chance to survive until birth. According to scientists presenting at the American Society of Gene & Cell Therapy's special meeting on Breakthroughs in Targeted In Vivo Gene Editing, this could be avoided.

2025 has been the most challenging year in the efforts to fight HIV since at least the advent of antiretroviral therapy. In a report on “Overcoming disruption, transforming the AIDS response,” released last week ahead of World AIDS Day on Dec. 1, the Joint United Nations Program on HIV/AIDS (UNAIDS) described “a global system in shock” by sharply reduced funding from the U.S. and other wealthy nations. Scientifically, for now, progress is ongoing. To mark World AIDS Day, Nature published three independent studies on HIV.