Eastern Equine Encephalitis Virus Infection and Hemophagocytic Lymphohistiocytosis in A 5-Month-Old Infant Mancao MY et al. - Eastern equine encephalitis virus infection is a rare sporadic central nervous system infection transmitted by a mosquito vector. Hemophagocytic lymphohistiocytosis is a rare life-threatening disease associated with the inability of an overactive immune system to effectively respond to infections. Many viruses are known to trigger primary, as well as secondary, HLH. [more...]