Connotation is mostly used in a sentence to show:
This refers to the implied meaning of a word as it is used in a sentence which is not the first meaning.
With this in mind, we can see that the connotation of the word "infectious" can be used to state that:
However, for you to get the correct answer, it is very important that you reread the text and try to find out the context used which was used to talk about the infectious situation.
Please note that your question is incomplete so I gave you a general overview to help you get a better understanding of the concept.
Read more about connotation here:
https://brainly.com/question/953101