A vaccine 疫苗 yì miáo is often a substance 物质 wù zhí that contains weakened or dead pathogens 病原体 bìng yuán tǐ. These weakened or dead pathogens 病原体 bìng yuán tǐ could potentially induce the body to build antibodies 抗体 kàng tǐ to protect against diseases 疾病 jí bìng. Although these weakened or dead pathogens 病原体 bìng yuán tǐ are no longer able to cause the diseases 疾病 jí bìng, they are still able to stimulate the body's immune system 人体免疫系统 rén tǐ miǎn yì xì tǒng (see also immunity 免疫 miǎn yì) to produce the proper response 反应 fǎn yìng.

Among the diseases 疾病 jí bìng that can now be prevented with the use of vaccines 疫苗 yì miáo are Ebola 伊波拉 yī bō lā, measles 麻疹 má zhěn, mumps 痄 zhà and polio 小儿麻痹 xiǎo ér má bì. This form of immunisation 免疫法 miǎn yì fǎ was pioneered by Edward Jenner in the mid 1700s who discovered the smallpox vaccine 天花疫苗 tiān huā yì miáo. Since then, millions of people have been saved from deadly diseases 疾病 jí bìng through vaccination 预防接种 yù fáng jiē zhǒng.

Note: Nowadays, a vaccine 疫苗 yì miáo can be manufactured using an agent that behaves like weakened or dead pathogens 病原体 bìng yuán tǐ (which could also bring about the same results as stated above).

In three languages

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antibodies - antibodi - 抗体 kàng tǐ

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body immune system - sistem pengimunan badan - 人体免疫系统 rén tǐ miǎn yì xì tǒng

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diseases - penyakit - 疾病 jí bìng

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Ebola - Ebola - 伊波拉 yī bō lā

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immunisation - pengimunan / pelalian - 免疫法 miǎn yì fǎ

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immunity - keimunan / kelalian - 免疫 miǎn yì

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measles - campak - 麻疹 má zhěn

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mumps - beguk - 痄 zhà

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pathogens - patogen - 病原体 bìng yuán tǐ

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polio - polio -  小儿麻痹 xiǎo ér má bì

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response - gerak balas / respons - 反应 fǎn yìng

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smallpox - cacar - 天花 tiān huā

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substance - bahan - 物质 wù zhí

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vaccine - vaksin - 疫苗 yì miáo

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vaccination - pemvaksinan - 预防接种 yù fáng jiē zhǒng

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