Because there is no second chance to cause an authentic first impression.

因为没有第二次机会给人留下真实的第一印象。

But the CDC also says there's a remote chance that the vaccine can cause side effects and serious injuries.

但是美国疾病控制中心同时表示，虽然可能性极小，但是MMR疫苗可能会引发副作用并导致严重受伤。

Safe probiotic bacteria could perhaps lie dormant within our guts, where they'd detect, prevent, and treat disorders before they have the chance to cause symptoms.

安全的益生菌甚至能以休眠状态潜伏于内脏，在任何体内失调可能导致疾病症状发生之前，进行探测、阻止及治疗。

And so if you miss the eye, there is a chance you can cause them some pain by hitting them and striking them in the eardrum.

所以即使你没戳中眼睛，也可能会击中或打到耳膜，使之产生疼痛感。

And often an enterovirus is really no big deal. If you've ever had a summer cold, there's a very good chance that that was caused by an enterovirus.

通常感染一种肠道病毒不是什么大问题。如果你夏天曾经感染感冒，很可能是肠道病毒引起。

The CDC says there's a remote chance that the MMR vaccine can cause side effects and even serious injuries which is why some parents are holding off on getting it for their children.

疾病预防控制中心还说，MMR疫苗有可能会产生副作用，甚至对儿童造成严重的伤害，这就是为什么一些父母迟迟不给他们的孩子接种的原因。

Doctors say it's more than 90 percent effective at preventing measles if someone who's had MMR is exposed to the virus but the CDC also says there's a remote chance that the vaccine can cause side effects and serious injuries.

医生称注射MMR后，人类抵抗麻疹病毒的成功率超过90%。但疾控中心同时表明，该疫苗有极小概率会产生副作用并造成严重受伤。