为了预防疾病，增进健康，必须了解传染病和免疫的基础知识。
To prevent disease and keep healthy, we must know the basic knowledge on the infectious diseases and immunization .
众所周知，绿茶可以治愈和预防诸如癌症，心脏病，风湿性关节炎，传染病，免疫系统损伤，心血管疾病。
Green tea is known to heal and prevent diseases like cancer, heart disease, rheumatoid arthritis, infections, impaired immune functions, and cardiovascular diseases.
在多数国家，全球消灭工作通过建立有效的监测和免疫系统拓展了能力，从而能对付其它传染病。
In most countries, the global effort has expanded capacities to tackle other infectious diseases by building effective surveillance and immunization systems.
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