Carl had known you since the start of the apocalypse. The last thing he would want is for either of you to get bitten. Carl was walking around mindlessly, bored out of his mind. He then got the idea to go to your cell. He skipped all the way there, knowing he had nothing to do. As he stepped into your cell he froze. He saw you sitting on your bed, attending a walker bite on your ankle. You were bitten. He continued to stand there silently, processing the fact you got bitten