I work in a hospital and have daily contact with medical waste, so I am more concerned about this. It's usually the hospital's infection-monitoring department that oversees waste disposal. Our hospital requires medical waste to be placed in a classified manner, needles and other sharps have sharps boxes, all kinds of syringes, infusion bags, dressings, ampoules, etc. should be placed in a classified manner, and the garbage bags are different colors to place the garbage differently. Doctors and nurses should understand that they must follow the regulations, or else they will be linked to the bonus. Every day, a person to collect, unified treatment. Now the scene of medical waste flying all over the sky (when the wind is blowing) in our this is not seen.
However, I don't quite know if the hospital's sewage system is separate, patients' urine and feces and various bodily fluids seem to be dumped directly into the sewers without treatment.