Immunity, the God-given weapon against infection

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The development of human civilization is a history of struggling with diseases.In the past,people have sufered a lot from the epidemic of infection diseases such as cholera and smallpox.For a long time,people were helpless and had no useful tools to counteract these diseases.It is not until recent several hundred years that the human beings gradually seize the initiative in this batle.People gradually ind out the prime culprit for infection and learn to know about infectious diseases.More importantly,the utilization of vaccine The development of human civilization is a history of struggling with diseasess.In the past, people have sufered a lot from the epidemic of infection diseases such as cholera and smallpox .For a long time, people were helpless and had no useful tools to counteract these diseases.It is not until recent several hundred years that the human beings gradually seize the initiative in this batle.People gradually ind out the prime culprit for infection and learn to know about infectious diseases.More importantly, the utilization of vaccine
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