Casper, WY – Wyoming health officials suggest using caution if you're cleaning out that cabin for summer use. Doctor Marty Thone of the Casper/Natrona County Health Department says breathing in deer mice droppings while clearning that closed space could lead to Hantavirus Pulmonary Syndrome. He says there have been a total of four hantavirus cases in Wyoming since 1992. Thone says that may not seem like a lot, but all of the cases have been fatal. He says there's no cure for hantavirus so prevention is the best defense. Thone says you should wear a mask and gloves while cleaning, wet down the area with a bleach and water solution and wipe up the mess with a rag or paper towel.