Usually when I was sick i wouldnt want to eat anyway so i guess i would just stick to fasting but never ignore your body signals, if you are unwell and hungry - eat. When you will get better you can get back on track
I’m just getting over Covid and I didn’t stick to fasting at all when I was sick. I felt way too terrible to even care. I ate nothing but ice cream and noodles for a few days and I don’t regret it. It made me feel better when I felt absolutely awful and could barely boil water in the kitchen. It was weird though because I lost like 2 more pounds! And I was worried about gaining weight. If you’re feeling like crap, take a break until you feel better if you want. It can also be a curve ball for your body if you hit a plateau to eat normally for a few days which can sorta kickstart weight loss again. I think that’s what happened to me.
I would listen to your body and if it needs nourishment, give it. I recently had this stupid flu and had just started fasting. I had to put a pause on it to eat regularly. Needed food in my stomach for Tylenol and ibuprofen.