Here, all of England’s tallest mountains are found – forged by ancient volcanos, carved by glaciers, resplendently rocky and rising above Cumbria’s famously picturesque green dales.

“It was a mystery. Why are there some cases of Rocky Mountain spotted fever in New England?” Xu said in the release. “This finding may solve part of the puzzle. Maybe the rabbit ticks are ...

Rocky Mountain spotted fever (RMSF) is a bacterial infection that you can get after a tick bite. Most people get this infection in spring and summer, warm months when ticks are most active.