Here's a new one for me on my 4th safari - I contracted African Tick Bite Fever! Got the sever headache and the sore lymph nodes (on the side of the tick bite, never bi-lateral inflamation), the shakes and chills and general maliase feeling for 2 days. Seems Nov - April in the RSA is the most active time to contract it. IT MUST BE TREATED to avoid liver damage but it's easy with Doxycyclene (100 mg tablets twice a day for 7 days). Feel better in 2 or 3 days but finish the pills to avoid a relapse in 6 months. Always something new to learn.