1. Natural environment2. Chemicals and drugs3. Microorganisms and parasites4. Waste5. Sounds and radiation6. Electricity7. Natural and unnatural disasters8. Surroundings9. Gravity and mechanical stress10. People1. Natural EnvironmentNatural environmental factors such as air can threaten the safety of hospital staff, patients and guests. Some diseases can be transmitted through the air over long distances and be transmitted to other people in hospital if the air is not properly filtered. The term “hospital acquired infection” (HAI) is used for these cases. HAIs have become a public health problem with high levels of morbidity and mortality. Another factor would be water. Water explains itself. If water spills on medical equipment, it could cause a malfunction of the equipment which could prove fatal to the patient connected to the said equipment, especially if the patient's life depends on the equipment. Water can also carry and spread waterborne diseases such as thyroid.2. Chemicals and Drugs Chemicals can be harmful to hospital staff, patients and guests. If not handled correctly, they can cause irritation to the skin, eyes and lungs. Some chemicals can be corrosive, meaning they could physically harm medical equipment, as well as hospital staff, patients and guests. Drugs can also be harmful in the event of an overdose, whether accidental or due to faulty equipment. It may also be possible that patients are prescribed the wrong medication, which could cause unwanted results. Another possible problem could be the different drug allergies that different patients might have. Some components of the drugs... at the heart of the document... give the patient's family cause to sue the hospital. Carelessness occurs, for example, when nurses and doctors misplace or misname chemicals, medications and materials. This could lead to very disastrous situations when the wrong chemicals, drugs and materials are used for different procedures. It could also cause loss of life or collateral damage to the hospital building. Negligence can also be considered improper disposal of hazardous waste which can be hazardous as stated above. Clumsiness is, for example, when people in the hospital trip and fall, spill chemicals or acids, and much more. This can be dangerous if you fail to clean up the spill properly or if you fall and spill something corrosive on patients or guests. People can also be carriers of diseases and infections. They can spread these diseases and infections through contact with other humans.