根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Things You Should Know About COVID-19
COVID-19, a cousin of the SARS virus, has infected more than ten million people since the outbreak began in Wuhan, China in December, 2019. Scientists think it likely started in an animal and spread to humans. The World Health Organization offered guidance to countries on how they can prepare for it. Here are four things you should know about it.
What are the symptoms?
It's from a family called the corona viruses. The symptoms of this illness are pretty ordinary on the face of it: it's a dry cough fever and then breathing problems.But we also know about the more severe cases, which is where people have gone on to develop viral pneumonia（病毒性肺炎）, and those people obviously end up in hospital, and all the deaths have been among those people.
How is this virus transmitted?
It was hoped at first actually that it just came from animals as all corona viruses do. But now it looks as though it is actually passed from one human being to another. We've got people to people transmission, because the market has been closed for sometime, and there are cases in people who've never been near it.
So there actually isn't any treatment at the moment at all, because this is a virus. Antibiotics（抗生素）won't work.So really you want to know antiviral treatment, but none of the flu drugs that we've got works effectively on this now. A corona virus is different from a flu virus, so there actually isn't any treatment at the moment at all.
Should we be panic about this outbreak?
Though there have been so many cases so far, it is possible for us to largely reduce the risk of infection if we can take preventive measures, including regularly washing our hands, covering our sneezes, and wiping down surfaces. Good news is that in the months since, we've seen the social distancing measures taking effect, too.
| A. What treatment is available? B. What should we do if we are affected? C. They only work against bacteria not viruses. D. Actually there is no need for us to be too anxious about it. E. It seems quite mild in lots of people, and probably those people don't end up in hospital at all. F. Although your body is very strong and healthy, you're going to find it very hard to fight off a virus. G. We've only just discovered that the new corona virus is actually transmitted from one person to another. |