As students return to school and cold and flu season begins, researchers are studying ways to improve indoor air quality and reduce the risk of airborne disease transmission. A study in ACS ES&T Air reports test results of do-it-yourself (DIY) air filters, known as Corsi-Rosenthal Boxes, in university class sessions. The units reduced particulate matter across the occupied classroom by 61%, produced minimal noise, and were more affordable than commercial portable air purifiers.

An international research partnership is setting out to address a long-standing gap in global health: children weighing less than 15 kg, broadly corresponding to those under five years of age, are affected by the same parasitic diseases targeted by ivermectin-based control programmes, yet are excluded from receiving the drug because there is currently not enough safety evidence to support its use in this age group.

The IVM-KIDS project aims to address that evidence gap. Bringing together eight institutions across Africa and Europe, the four-year initiative will generate the clinical, pharmacological and regulatory evidence needed to determine whether ivermectin can be safely and effectively extended to treat younger children.

If successful, the project could help pave the way for younger children to be included in ivermectin-based programmes targeting several neglected tropical diseases. Children weighing less than 15 kg are estimated to represent around 20% of the population in endemic regions, making this evidence gap relevant not only to individual treatment, but also to the reach and inclusiveness of large-scale parasite control programmes.

In a new study, scientists have made significant progress in developing a robust approach for the identification of chemical hazards using an informed selection of in vitro bioassays.

Mitochondrial transplantation is emerging as an organelle-level therapeutic strategy for diseases associated with mitochondrial dysfunction. A new Perspective in Science Bulletin discusses how engineered mitochondrial delivery systems may improve mitochondrial stability, targeting, and clinical translation.

What if cells that form scars after a spinal cord injury could become part of the repair process? Researchers have developed a genetic system that converts certain scar-forming cells into neurons, improving movement in mice and rats with spinal cord injuries.