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Why are vaccines not a cure to AIDS?

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do they test on animals?

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How does they know the vaccines are going to work and not  cause harm to the body.

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Why is AIDS not curable?

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Why was the hepatitis B virus the first to be made with recombinant DNA?

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who started to  make vaccines?

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Who came up with the idea to create Vaccines?

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How long will making a vaccine for cancer and tuberculosis take?

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If you are trying to prevent a diseases then why are they putting part of it in your body?

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What does genetic engineering technology do?

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Why is their not a vaccine for aids

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How does the immune system fight off diseases?

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Could vaccines be made from things other than weakened or killed forms of a disease?

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Why are vaccines made from disease causing or bacterium?