Scratch and sniff stickers have gone high tech, becoming another way to test for coronavirus. Researchers at the University of Colorado and Yale University have developed a “u-Smell-it” test that ...

CHICAGO — Difficulty identifying common smells such as lemon, banana and cinnamon may be the first sign of Alzheimer’s disease, according to a study that could lead to scratch-and-sniff tests to ...

A new study provides further evidence that a simple scratch-and-sniff test could predict Parkinson's disease even earlier than previously thought. According to Michigan State University researcher ...