You're reading the prophylaxis guide for Tularemia, not Lyme. The section on lyme says: "In areas that are highly endemic for Lyme disease, a single prophylact

You're reading the prophylaxis guide for Tularemia, not Lyme. The section on lyme says: "In areas that are highly endemic for Lyme disease, a single prophylactic dose of doxycycline (200 mg for adults or 4.4 mg/kg for children of any age weighing less than 45 kg) may be used to reduce the risk of acquiring Lyme disease after the bite of a high risk tick bite." You can also see their guidelines for doctors here: https://www.cdc.gov/lyme/resources/FS-Guidance-for-Clinicians-Patients-after-TickBite-508.pdf https://www.cdc.gov/lyme/resources/FS-Guidance-for-Clinician...