Ticks That Can Make People Severely Allergic To Meat Are Spreading In The U.S.

Alpha-gal allergy is caused by the bite of a lone star tick—a species traditionally found mostly in the Southern United States that has spread farther north in recent years. And as the tick spreads, more and more cases of meat allergies are being reported. In one area of Long Island, New York, for example, one doctor we spoke with has seen an increase of 200 cases in the past three years—up from practically zero in 2011.

Read more from Loren Grush at Popular Science.