A vaccine can help keep people healthy and protect them from a certain virus. For example people in the United States get the flu shot when they get this shot the vaccine wont magically get rid of the virus but rather help them fight it off and protect them in the future if they keep up to date getting the vaccine
Answer:
An embryo is the early stage of human growth in which the vital body structures of organs are developed. In the 11th week of pregnancy, which is the 9th week of development after egg fertilization, an embryo is considered a fetus.
Explanation:
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