A vaccinate is natural immunity. it uses dna from the virus to teach your immune system how to fight this particular type of virus. if you believe that your nat

A vaccinate is natural immunity. it uses dna from the virus to teach your immune system how to fight this particular type of virus. if you believe that your natural immunity is strong, giving it an extra training course can't hurt in any way. even if I think I've mastered the material, I still study before the final exam. because...why wouldn't you?