365个英语简短小故事-304. Avoid the Flu
时间：2019-01-09 作者：英语课 分类：365个英语简短小故事
Flu season occurs annually 1 in countries that have cold weather in the winter. Although the influenza 2 virus is alive throughout the world in all four seasons, it seems to have its greatest impact on humans during the winter. Scientists are not sure why. They think it’s because in the winter people are indoors and close together for longer periods of time. Also, the virus might be able to live longer and be stronger in colder weather. Finally, indoor air can dry up the mucous 3 that helps protect people from the virus.
In the U.S., the virus is not something to sneeze at. It kills about 36,000 people annually (most of them elderly). It also causes almost 250,000 people to end up in a hospital bed annually.
Scientists develop a preventive flu shot for people to take as winter begins. This shot is not guaranteed to prevent flu; scientists can only guess at which virus might be the most dangerous in the upcoming season. The shot protects against only that particular virus. For those who do not get the shot, influenza spreads among them easily. It takes only a sneeze, a cough, or a touch. Victims frequently get ill from shaking hands, opening doors, or handling money.
Most infected people will have a fever, sore throat, and cough. But the symptoms are often mild and last for only a week. For many others, however, symptoms can be so severe and prolonged 4 that victims end up in bed for weeks, or in the hospital, or in the cemetery 5.
- Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
- They celebrate their wedding anniversary annually.他们每年庆祝一番结婚纪念日。
- They took steps to prevent the spread of influenza.他们采取措施
- Influenza is an infectious disease.流感是一种传染病。
- Healthy,skin,mucous membranes,and cilia are natural barriers to many viruses.健康的皮肤，粘膜和纤毛是许多病毒的天然屏障。
- Seromucous glands contain both mucous and serous cells.浆粘液腺既含有粘液性细胞，又含有浆液性细胞。
- Prolonged strike action debilitated the industry. 长时间的罢工削弱了这个行业的活力。
- prolonged exposure to harmful radiation 长时间接触有害辐射