Non-specific viral illness
Most common admitting diagnosis in one case study was "fever of unknown origin"
Babesiosis
Colorado tick fever
Ehrlichiosis
Heartland virus
Lyme<unk> 
Rocky mountain spotted fever
Southern tick-associated rash illness (STARI)
Tick paralysis
Tularemia
Normal causes of acute fever!
Malaria
Dengue
Leptospirosis
Typhoid fever<unk> 
Viral hemorrhagic fevers
Ebola virus disease
Marburg virus disease
Lassa fever
Crimean-Congo hemorrhagic fever
Chikungunya
Yellow fever
Rift valley fever
Q fever
Amebiasis
Zika virus
Ebola virus disease
Marburg virus disease
Lassa fever
Crimean-Congo hemorrhagic fever
Murine typhus
Non-specific viral illness
Rat bite fever
Most common admitting diagnosis in one case study was "fever of unknown origin"[2]
Epidemic typhus
Babesiosis
Drug fever
Colorado tick fever