公共健康

一场本地 Epidemic 从市场里的一声轻咳开始，大家一下子都成了 Prevention 专家。诊所立刻安排 Vaccination，学校也不停提醒学生注意 Hygiene。

很快，Outbreak 的源头被查到是一根被污染的水管，医生指出有一个 Vector 让 Pathogen 传播得太轻松了。Quarantine 立刻启动，一些邻居先是抱怨，后来才发现安静下来的街道居然也挺舒服。

市长提醒大家，如果没人重视，单次 Infection 可能拖成 Chronic Disease。他还说，忽视早期治疗会让 Mortality 上升，所以镇上连夜做了 Intervention，还把 Sanitation 全面提升。

到了下周，Symptom 数量下降了，Transmission 链条也变慢了，连最固执的居民都主动来要 Treatment。随着 Immunity 变强、风险变少，整个小镇终于明白了公共健康为什么重要。

A local Epidemic started with a tiny cough at the market, and everyone suddenly became an expert in Prevention. The clinic answered with Vaccination, while the school kept reminding students about Hygiene.

Soon, the Outbreak was traced to a contaminated water pipe, and the doctor pointed out that one Vector had helped the Pathogen travel far too easily. Quarantine was set up at once, which made some neighbors complain until they realized the quiet street was also strangely peaceful.

The mayor warned that a single Infection could become a Chronic Disease if no one paid attention. He also said Mortality rises when people ignore early care, so the town launched a quick Intervention and improved Sanitation overnight.

By the next week, the Symptom count had dropped, the Transmission chain had slowed, and even the most stubborn resident asked for Treatment. With stronger Immunity and fewer risks, the whole town finally understood why public health matters.

Word list: Contagious, Prevalence.