Lyme disease

There isn't currently a Lyme disease vaccine on the U.S. market. Researchers are hoping to change that.

The threat of Lyme disease has spread to all 50 states.

The tick-borne illness is spreading north and south — about 300,000 U.S. cases a year. As scientists work on better diagnostic tests and surveillance tools, you can take steps to cut your risk.

The world is seeing more and more new diseases, and the U.S. is no exception. We're living in a hot spot for tick-borne diseases. Some are deadly. The key to stopping them may be an unlikely critter.

Scientists have tested all sorts of strategies to keep Lyme disease ticks from biting us. One is to make it less likely you'll cross paths with the critters in your yard. Sawdust mulch, anyone?