parts of your body that work together to fight disease

to make someone sick

to keep a person or an item safe from harm or illness

something wrong with your body that shows you are sick

a substance used to keep people from getting a disease

a tiny living thing that causes diseases

to move and affect a larger area

to stay away from a person or thing

to take over and cause something to stop working

something that people can’t understand or explain

to have or hold something

to be put in a situation that is dangerous or unpleasant

not often seen or found

to send someone to a place for a job or responsibility

to provide proof that something is true

to figure out the facts or truth about something