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How Can Vaccines Prevent Disease? This is the complete explanation — World Today News

Jakarta – Research institutes, colleges and pharmaceutical companies from around the world are working to develop vaccine in the face of a caused pandemic corona virus. Then how exactly does it work vaccine so that it can prevent a disease? The concept of vaccination was first introduced by an English doctor named Edward Jenner in…

How Can Vaccines Prevent Disease? This is the complete explanation — World Today News
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