I mean, assuming she really is from a world similar to ours she should know about the concept of bacteria, viruses and general cooties. And how for a good bunch of human history people did not know that, and how it might be likely that these people from another world do not have that same knowledge. But besides that it's just stupid to use a real illness when you don't want to commit to the symptoms - imo anyways.
She literally said "Tuberculosis is not contagious in this world".
I mean, assuming she really is from a world similar to ours she should know about the concept of bacteria, viruses and general cooties. And how for a good bunch of human history people did not know that, and how it might be likely that these people from another world do not have that same knowledge.
But besides that it's just stupid to use a real illness when you don't want to commit to the symptoms - imo anyways.