Virus n. 病毒 Coronavirus n. 冠状病毒 Infection n. 传染 Syndrome n. 综合征 Sars: 重症急性呼吸综合症 Pneumonia n. 肺炎 Severe adj. 严峻的 Severity n. 严重 Sneeze n/v 喷嚏 Contain v. 防止蔓延或恶化 Vaccine n. 疫苗 Coronaviruses are a large family of viruses that cause disease in mammals and birds. Coronaviruses can cause illnesses that range from the ___1___ to much more _____2____ like Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS). Experts still do not have a ___3____ of the severity of the new coronavirus. Officials are calling the disease a "novel" or new coronavirus because it ____4_______ in humans. The newly __5__ virus is thought to have spread to humans from wild animals sold at a market in Wuhan, in central China's Hubei province. But it is now spreading between people. Chinese officials say the disease is able to spread from one person to another even before any __6____ signs appear . This makes it especially hard to contain. Signs of the disease among infected ___7____ have included fever, cough, shortness of breath and general breathing difficulties. In more severe cases, the virus can cause pneumonia. Some people report few or no signs, while others have gotten very sick or even died. The U.S. Centers for Disease Control and Prevention reports that signs of the virus may appear between two and 14 days after being near someone who is ___8____ . There is no special treatment for the new coronavirus. However, many of its effects are ____9___ , as long as a patient is in fair health. Because the virus is so new among humans, there is no available vaccine to protect ___10____ the disease. But the World Health Organization advises people to avoid close contact with anyone showing signs of a breathing sickness, such as coughing or sneezing. It also says people should wash their hands often and use safe food practices . The U.S. Centers for Disease Control also published prevention tips . It says wash your hands for at least 20 seconds with soap and water; avoid touching your face with unwashed hands; stay home when you are sick; and clean objects and surfaces that are touched often.