Researchers at the Cary Institute for Ecosystem Studies, in upstate New York, comb the woods in search of ticks. Photography by Kirsten Luce

Lyme Disease Cases Are Exploding. And It’s Only Going to Get Worse.

Climate change and human sprawl have triggered a pandemic

This story is part of “Tickpocalypse,” a multi-part special report.

Kelly Oggenfuss is walking into the woods. Leading her team of four young researchers through a thicket of slender oak trees, she doles out assignments by…