Researchers have demonstrated a novel vaccine delivery method in an animal model, using dental floss to introduce vaccine via the tissue between the teeth and gums. The testing found that the new technique stimulates the production of antibodies in mucosal surfaces, such as the lining of the nose and lungs.

The largest genetic analysis of stuttering has demonstrated a clear genetic basis for the speech disorder, highlighting neurological pathways of risk. The study, published July 28 in the journal Nature Genetics, used data representing more than 1 million individuals who had their DNA analyzed by the company 23andMe Inc.

Scientists at UC Davis used artificial intelligence to help plants recognize a wider range of bacterial threats — which may lead to new ways to protect crops like tomatoes and potatoes from devastating diseases, according to their study in Nature Plants.

Naloxone (also known as Narcan, the commonly used drug to treat narcotic overdoses) has greater binding to opioid receptors in women’s brains than in men’s brains, according to new research published in the July issue of The Journal of Nuclear Medicine. The first-in-human whole-body PET study suggests men and women may respond differently to opioid use disorder treatments and offers new insights to advance neuropharmacology.