Allergy season is starting 19 days earlier than it did 20 years ago, researchers have found.Catherine Monteleone sometimes jokes that her patients are among the few who aren’t happy when their test results are negative. She’s an allergist-immunologist at Rutgers Robert Wood Johnson Medical School, and people with allergies want to know what’s causing their symptoms — what, precisely, they’re allergic to — so they can take steps to lessen the misery. “It’s like a puzzle,” she said of treating a person suffering from allergies. Being able to figure out what’s causing an allergy and fix it is gratifying, she said. To read the full story.