Tick bites hit highest levels since 2017 as Lyme disease cases rise due to climate change and expanding tick habitats. Learn ...

Inside Douglas Norris' lab at the Johns Hopkins Bloomberg School of Public Health is a healthy stack of envelopes — not with letters inside, but with ticks.

You have heard about Lyme disease, but how much do you really know about it? Experts say most tick bites happen in June and July, with symptoms taking anywhere from three to 30 days to appear.