Lyme disease
Infected ticks are the only contagious things you need to worry about in terms of Lyme disease, according to the CDC—and only if they attach to your body and feast on your blood. That means that you can’t catch this bacteria-based disease from other people, whether it’s through casual contact, kissing, or even sex. Pets can’t infect you either, though they can carry ticks into your home. Fever, fatigue, and a distinctive bull’s eye around the infected site are among the early symptoms of Lyme disease, while later on, people may develop severe joint pain, debilitating headaches, tingling in their hands or feet, and brain and spinal cord inflammation