Are you a bit sickly

Or robust. 

You have always struck me Jelly as a somewhat poorly fellow. 

Cleaners, nurses, therapists and wotnot. You need to leave the smog and get some fresh air fella.

Other than heart surgery, I am a robust individual.  I have never been ill in my life until a surgeon told me that I needed a new heart valve.  That was a shock.  But, sorted and I am well on the way back to full fitness.