Fasting or eating low cal when you have a bad cold?

Givemewings

Those of you who fast or do the 5:2 diet, would you do this when you have a bad cold? I have a bad cold which i have had for over a week. I have done two fast ( or 600 cal) days whilst unwell and am still feeling unwell. I'm wondering whether to do the planned fast on Wednesday or not. Any advice gratefully received as I'm new to this!