Now,a team of U.S.scientists think they're on track to developing a "universal" vaccine that will protect people against all kinds of influenza.

VOA: standard.2010.07.21

The universal state will never allow for or does not allow for the kind of self-perfection that a small, self-governing polis will have.

万国之城将永不会允许,或说不会允许一种自我完善,那只有在小型，自治的城邦中才行得通。

耶鲁公开课 - 政治哲学导论课程节选

Preliminary phase one tests of this new type of flu vaccine have already started in humans, but in an interview, Nabel said that even if all goes well, it will still be years before a universal flu vaccine is widely available.

VOA: standard.2010.07.21