BioWorld’s 2022 end-of-year highlights included a toast to the future – of universal vaccines. Even before SARS-CoV-2 vaccines were developed in record time and saved countless lives during the COVID-19 pandemic, vaccines were a rare bright spot in the fight against infectious diseases. Bacteria are becoming multidrug resistant far faster than new classes of antibiotics are being developed, viral spillover events and vector ranges are increasing, and climate change is helping bacteria and fungi alike breach human thermal protections against infections.

Advances in antiretroviral therapy (ART) now allow people living with HIV to lead normal lives with undetectable and nontransmissible levels of the virus in their blood. Yet that reality is limited to those with access to treatment. More than 40 million people worldwide live with HIV, with over a million new infections and hundreds of thousands of deaths each year, underscoring that major challenges remain.

Gene editing can repair mutations that prematurely halt protein synthesis, resulting in incomplete peptides that cause various diseases. However, other approaches achieve the same effect without altering the genome. Startup Alltrna Inc. has developed a strategy based on transfer RNA to bypass the premature stop codons that end early protein translation. The company already has a first clinical candidate that could treat metabolic diseases such as methylmalonemia or phenylketonuria.

Gene editing can repair mutations that prematurely halt protein synthesis, resulting in incomplete peptides that cause various diseases. However, other approaches achieve the same effect without altering the genome. Startup Alltrna Inc. has developed a strategy based on transfer RNA (tRNA) to bypass the premature stop codons that end early protein translation. The company already has a first clinical candidate that could treat metabolic diseases such as methylmalonemia (MMA) or phenylketonuria (PKU).

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.

“I love the idea of ‘micropublications’ (preparing one now),” the neurobiologist Oded Rechavi commented on social media in July. The term clearly suggests a short article, and although the publishing model has been around for more than a decade, not everyone is familiar with this type of scientific communication. What are they? What’s their impact? Rechavi, a professor at the School of Biochemistry, Neurobiology and Biophysics at Tel Aviv University, was pointing to an emerging discussion among scientists, the search for alternative formats for their work.

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.

The number of deaths caused by prion diseases reaches about 30,000 annually. Only 5 months pass from the diagnosis of seemingly healthy patients to the fatal outcome of this neurodegenerative condition, and just 1 month until quality of life is completely lost. Removing the brain protein that causes this genetic or infectious disorder could be achieved thanks to new gene-silencing techniques. At a special meeting of the American Society of Gene & Cell Therapy, in “AAV-mediated epigenetic editing for prion disease,” Sonia Vallabh presented not just the data of her research, but the impact of this disease on her family and on herself.

The field of gene therapy is experiencing major advances driven by precise editing technologies, such as base and prime editing, and by the design of increasingly sophisticated vectors to deliver payloads that could reverse the effects of diseases. However, in the transition to in vivo applications many approaches still fail in their attempt to effectively reach target tissues or cells.