How does DNA and vaccines work and why is it important, if you use something from a website, please site

DNA and Vaccines work by injecting a small dosage of the virus so your immune system already knows how to react.

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the