Health hazard
A health hazard or health risk was anything which could negatively impact one's health.

In 2365, William T. Riker asked Doctor Katherine Pulaski if there would be any health risks to Deanna Troi were her unborn baby to be aborted. ()

In 2370, Dr. Beverly Crusher gave radiation leaks and biochemical contamination as two examples of health hazards she and Lieutenant Worf would be inspecting his Toron class shuttle for. ()

Also that year, Julian Bashir expressed his belief that a darts rematch with Miles O'Brien would kill the chief engineer. When Jadzia Dax called him on his exaggeration, Bashir admitted he was overstating the potential health risk. ()

In 2376, after seeing Vinka and Azen, two Qomar, become dizzy and disoriented while waiting in line to meet The Doctor, Tom Paris suggested The Doctor might be hazardous to their health. ()

See also
 Hazardous material
 Fire hazard
 Occupational hazard
 Workplace hazard
Medicine