Anyone feels a sever drop in productivity with the slightest trace of sickness?

I'm not a very productive person but I can manage fine with my uni studies, daily exercise and other hobbies like language learning etc. I devote a significant amount of time to these throughout the week.

However when I get little bit of cold or cough I completely shut down. Even studying gets difficult. Is this normal or am I just lazy? Thoughts?

Anyone feels a sever drop in productivity with the slightest trace of sickness?
Yes, I completely shut down when sick.
No, I can work just fine.
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Anyone feels a sever drop in productivity with the slightest trace of sickness?
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