yǐ nǎo乙脑Japanese encephalitis (abbr. for 乙型腦炎|乙型脑炎[yi3xing2 nao3yan2])Frequency 1.6MeaningsJapanese encephalitis (abbr. for 乙型腦炎|乙型脑炎[yi3xing2 nao3yan2])