CNN News：新型流感病毒

H1N1 and H3N2 are examples of what?

H1N1和H3N2是什么?

Asteroids, flu strains, chicken breeds or robots?

小行星，流感毒株，雞類還是機器人?

With an H4 hemagglutinin and an N4 neuraminidase, these are examples of strains of the flu.

H4血凝素和N4神經氨酸酶，這些都是流感病毒株。

AZUZ: And a flu strain circulating in the U.S. this year, like the one that hit Australia last year, is a nasty one. Widespread flu activities are being reported in every part of the continental U.S. at the same time. This is the first year that`s happened in the 13 years that the Centers of Disease Control has been monitoring the flu.

今年在美國流行的流感病毒，就像去年襲擊澳大利亞的流感病毒一樣，是一種令人討厭的病毒。美國大陸的每個地區(qū)都在同時報道廣泛的流感活動。這是在疾病控制中心監(jiān)測流感的13年中發(fā)生的第一年。

One reason: these year`s vaccine doesn`t appear to be very effective against the actual flu virus that`s spreading.

原因之一是:今年的疫苗對傳播的流感病毒似乎沒有什么效果。

Experts predict it will be about 30 percent effective. In recent years, the vaccine has been 40 and 50 percent effective, though there was an exception in the 2014 to 2015 season when the vaccine was only 19 percent effective, according to the CDC. And "The New York Times" reports that this season is looking a lot like that one.

專家預測，這一比例將達到30%左右。美國疾病控制與預防中心(CDC)的數(shù)據顯示，近年來，該疫苗的有效性已經達到了40%和50%，不過在2014年至2015年期間，該疫苗的有效性只有19%。《紐約時報》報道說，這個賽季看起來很像那個賽季。

The hopeful news is that experts think the flu season maybe hitting its worst point and that it`s starting to level off. But it takes weeks for flu activity t actually slow down.

好消息是，專家們認為流感季節(jié)可能達到了最壞的階段，并且已經開始趨于平穩(wěn)。但是，流感活動實際上需要幾周的時間才會減緩。