We all know that getting the flu is not fun. There are headaches, coughs, fevers, and other terrible feelings. To help us feel better, we take some medicine and get much rest. We drink lots of water and eat healthy food to make us feel better.
However, some people don't want to get sick at all. So, they get a flu shot before the flu season starts. The flu shot is in fact, a vaccine (疫苗)，not usual cold medicine. It will protect them from the flu.
The vaccine introduces some of the flu into the body. But don't worry. The flu is dead and won't make you sick. It will teach your body to know it and fight it off in the future, though.
Vaccines not only protect you but also protect others. That's because they help stop diseases from spreading (扩散) from person to person. When fewer people have the diseases, the chances of getting them go down. Sometimes, the diseases completely go away.
Even though vaccines are quite safe, some adults are afraid of them. Their worry is that the vaccines will cause serious side effects (副作用). Vaccines might cause side effects, but they are usually not as terrible as people think. For most people, vaccines are▲and make them better.
So, they are believable and people want them in their bodies. These days, people are in line for the new flu vaccines and hope they can protect them well!
B Vaccines do something bad in our bodies.
C. People with vaccines never get any diseases.D. Vaccines can drive all diseases from our bodies.
