Workplace Medical Mystery: What Is Making This Roofer Sick?

Ray drove to his work site on Monday morning, sipping coffee along the way. Spring was almost over, and everything was in full bloom. He was thankful for a cloudy day and cranked up the air conditioning, he knew he would start sweating once he got to work. Today Ray and his crew were working on a rubber roofing membrane installation. Ray parked and walked over to where the crew was setting up. Everyone was sharing stories from the weekend, but Ray hadn’t left the house since his kids came home from school sick on Friday. Ray wore his usual