The hallmark characteristic of stage I Lyme disease is EM RASH.
Lyme disease is caused by the bacteria Borrelia burgdorferi . It is transmitted to humans through the bite of infected blacklegged ticks. Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called erythema migrans(EM).
learn more about Lyme disease-
https://brainly.com/question/25945561
#SPJ4