to avoid
epidemic
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→mian3yi4 • miǎnyì
immunity
to be immune, be immune, immune
疫苗 能 帮助 身体 产生 免疫。
Yìmiáo néng bāngzhù shēntǐ chǎnshēng miǎnyì.
Vaccines can help the body develop immunity.
医生 正在 研究 免疫 系统。
Yīshēng zhèngzài yánjiū miǎnyì xìtǒng.
The doctor is studying the immunity system.
这 种 疾病 的 免疫 可以 持续 多久?
Zhè zhǒng jíbìng de miǎnyì kěyǐ chíxù duōjiǔ?
How long can immunity to this disease last?