Lyme disease is an infectious disease spread by ticks. The most common sign of infection is an expanding area of redness on the skin that typically takes on a ring or bull's-eye shape, as seen on the left, at the site of the tick bite about a week after it occurred. It takes 24-48 hours for a tick to transmit Lyme disease to the human host. Flue like symptoms occur several weeks after the tick bite if left untreated. For more information on Lyme disease please visit

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