美国有线新闻 CNN 美国流感肆虐 疫苗不能有效预防
时间：2018-12-02 作者：英语课 分类：CNN美国有线新闻2018年1月
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 1 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.
One reason: these year's vaccine 2 doesn't appear to be very effective against the actual flu virus that's spreading.
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.
The hopeful news is that experts think the flu season maybe hitting its worst point and that it's starting to le?vel off. But it takes weeks for flu activity t actually slow down.
DR. SANJAY GUPTA, CNN CHIEF MEDICAL CORRESPONDENT: Let me try and settle this flu shot thing, although I'm sure it's going to keep coming up again and again.
SUBTITLE 3: Debunking 4 flu myths.
GUPTA: You can't get the flu from the flu shot. It's a dead virus, it can't actually cause flu.
Why do people feel sort of crummy afterward 5? It's because the flu vaccine is actually working, making your immune system fire up, get ready and recognize it, if it actually sees the flu, how to kill it.
No, it's not 100 percent fail safe. But it's still going to offer a lot of protection, so you are not going to be as sick as likely to get sick or if you do get sick, have a shorter duration.
OK, so if you are like me, your mom probably said, don't go outside in the cold without your hat on, you are going to catch the flu. You can't catch the flu from just simply being outside in the cold.
But it does raise the question, why are there so many more flu cases in the winter months? You are likely to stay indoors more. So, if one person is sick, more people are likely to get sick.
The sun is lower in the sky, and as a result, you have less Vitamin D actually being produced in your body. Your immune system starts to get suppressed a little bit. You are more likely to get sick with the flu.
The winter months tend to be lower humidity. Viruses like the flu virus they like lower humidity. They are likely to live longer.
So, your mom may have been right — I mean, look, moms are always right, but maybe not for the reasons you originally thought.
- A continental climate is different from an insular one.大陆性气候不同于岛屿气候。
- The most ancient parts of the continental crust are 4000 million years old.大陆地壳最古老的部分有40亿年历史。
- The polio vaccine has saved millions of lives.脊髓灰质炎疫苗挽救了数以百万计的生命。
- She takes a vaccine against influenza every fall.她每年秋季接种流感疫苗。
- His new book has a subtitle.他的新书有一个副标题。
- Ah!I don't know why they don't subtitle these movies.唉！我不知道这些电影为什么不打字幕。