The present invention relates to adapted Enterovirus 71 (EV71) vaccine strains suitable for increased vaccine production for mammals. The EV71 vaccine strains contain at least one modified enterovirus protein that results in increased production of the EV71 virus from a mammalian host cell, such as a Vero cell. The present invention also relates to the vaccines produced from the adapted EV71 virus vaccine strains, and the producing method of the vaccines.本發明係關於一種用於提高哺乳動物疫苗產量的馴化腸病毒71型(EV71)疫苗株。該EV71疫苗株包含至少一個經修飾的腸病毒蛋白,可自哺乳動物宿主細胞(如Vero細胞)快速增殖EV71病毒。本發明亦關於一種從馴化之EV71病毒疫苗株產生的疫苗以及該疫苗的製造方法。