221 Ch 221. Yellow Fever, Japanese Encephalitis, West Nile, and Other Flaviviruses

Mosquito-borne flaviviruses; Yellow Fever (sub-Saharan Africa + S America, hemorrhagic + hepatic, 17D vaccine highly effective); Japanese encephalitis (Asia rice farming, vaccine effective); West Nile (USA + EU, neuroinvasive in elderly); Tick-borne encephalitis; Powassan (USA emerging); 多種 fevers but Yellow Fever + JE + WNV most clinical impact。