Vaccinesnotonlyprotectyoubutalsoprotectothers.That'sbecausetheyhelpstopdiseases(疾病)fromspreading(扩散)frompersontoperson.Whenfewerpeoplehavethediseases,thechancesofgettingthemgodown.Sometimes,thediseasescompletelygoaway.Eventhoughvaccinesarequitesafe,someadultsareafraidofthem.Theirworryisthatthevaccineswillcause...
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 ...
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 (疾...
根据第三段"The vaccine introduces some of the flu into the body.But don't worry.The flu is dead and won't make you sick. (疫苗会将一些流感病毒引入体内。但别担心。流感已经死亡,不会让你生病。)"和第四段"Vaccines not only protect you but also protect others.(疫苗不仅保护你,也保护他人。