There are several different forms of medical waste.. The one thing those forms have in common is they are all hazardous and need to be disposed of properly in order to maintain a safe and healthy environment. Some facilities have different medical waste containers to separate the different forms of waste. These containers have to be handled with the utmost care, since mishandling them could lead to infectious diseases being spread into the air. But what are the most common forms of medical waste? Here are the different categories and how they differ.