Question 20) How long does a tick need to be attached to a person for that person to get Lyme disease? Answer-Ticks need to be attached for at least 24 hours before they can transmit Lyme disease.However, just to be safe you should check your health closely for one month after a tick bite and call your doctor if you have any of the early signs of Lyme disease.uestion 20) How long does a tick need to be attached to a person for that person to get Lyme disease? Answer-Ticks need to be attached for at least 24 hours before they can transmit Lyme disease.