Your health is in your hands. You cannot “catch” anything unless you think you can, and thinking you can is inviting it to you with your thought. You are also inviting illness if you are listening to people talking about their illness. As you listen you are giving all of your thought and focus to illness, and when you give all of your thought to something, you are asking for it. And you are certainly not helping them. You are adding energy to their illness. If you really want to help that person, change the conversation to good things, if you can, or be on your way. As you walk away, give your powerful thoughts and feelings to seeing that person well, and then let it go.