virus – n. an extremely small living thing that causes a disease and that spreads from one person or animal to another

factor – n. something that helps produce or influence a result : one of the things that cause something to happen

backyard – n. an area in back of a house; the general area near and around someone's home

mixed – adj. (always used before a noun)  made of different kinds of things mixed together or combined

Now it’s your turn to use these Words in This Story. In the comments section, write a sentence using one of these words and we will provide feedback on your use of vocabulary and grammar.