Answer:
(Well a vaccine helps your memory cells remember the virus or sickness so your immune system can fight it better if you get it after you get vaccinated. A cure removes all of the disease in one dose and helps you body fight against it so it doesn't come back) -Raymond :3
Explanation:
Short explanation can be used to describe a summary.
Answer:
of practical use
Explanation:
Utility is similar to the word utilize, which is basically a stuffy word for use.