Funny, I had the same thought process. I was terribly sick with the flu for the past week too. I haven't been that sick in a long time. I could barely get myself to the doctor and back. For two days I didn't vape or smoke because I was so ill it was the last thing on my mind -- HOWEVER, it's true that back when I smoked analogs I would have surely gone outside in the freezing cold, in between fever and bathroom terrors to make sure i smoked! I was amazed myself, because of vaping I'm finally not that crazy addict anymore.
As soon as the worst was over I was craving nicotine and picked it back up. I think it has a lot to do with the fact that going outside to smoke is no longer part of my routine, so I didn't feel the need to do my normal routine to make myself feel less sick (I tend to try and push boundaries to tell myself I'm NOT sick anymore).