If you've been using your cat allergy as an excuse to stay far away from your Great-Aunt Mildred's place, you might need a new alibi: researchers at Cambridge University may have found a cure. After successfully identifying what causes the allergic reaction—a specific protein found in feline dander—scientists say they now know exactly what pill (or inhaler) could work to stop it. If the medicine gets FDA approval, a cat allergy remedy may be on the market as early as 5 years. Next up, gluten?