“流行性”的英语？

“流行性”的拼音为：liú xíng xìng...

上次患流行性感冒后使我至今软弱无力.The last attack of influenza has left me rather groggy.整个村子的人都得了流行性感冒.The whole village was attacked with influenza.那一年,流行性感冒来得异常凶猛.The grippe hit unusually severely that year....