ill health 
noun [mass noun]
Poor physical or mental condition: the president was absent due to ill health...
- Obesity has a colossal impact on physical, mental, and social ill health in many parts of the world.
- They say one in five British children now suffers from mental ill health, much of it stress-related.
- A lot of companies are losing a lot of money due to ill health because health and safety is not properly valued.
- flier
- flight
- flight attendant
- flight bag
- flight capital
- flight case
- flight control
- flight crew
- flight deck
- flight engineer
- flight envelope
- flight feather
- flightily
- flightiness
- flight jacket
- flightless
- flightlessness
- flight lieutenant
- flight line
- flight log
- flight number
- flight path
- flight plan
- flight recorder
- flight risk