I have underlined some problem areas. Please post your revised text: The article is about vaccination, which the passage defines as a process by/ in which weakened microbes will be injected into a body to increase immunity to a disease. Weakened smallpox doesn't kill a pers on, ra ther it triggers the immune system to produce antibodies to fight with smallpox.
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The article is about vaccination, which the passage defines as a process by/ in which weakened microbes are injected into a body to increase immunity to a disease. Weakened smallpox doesn't kill a person rather it triggers the immune system to produce antibodies to fight aginst smallpox. Once microbes are eradicated, antibodies stay in the blood, and if in the future similar microbes