In 2013, the H7N9 virus(病毒) hit Shanghai, Anhui, Jiangsu, Zhejiang and so on. It seemed that most people who were infected(被感染) with H7N9 had the common flu. Some people suffered from a fever or a cough.Don’t be afraid— it’s not easy to be infected with the virus. Here is some advice to help you protect(保护) yourself when it comes.Wash your hands. You need to wash your hands with soap and hot water before you eat, after you use the toilet(厕所), and after you touch animals, because your hands may carry viruses.Cover your nose and mouth. When someone sneezes（打喷嚏）o