The purpose of the vacuum sealing process is to keep food items fresh and healthy for a long time by preventing the growth of bacteria, fungus & other harmful microorganisms that will cause spoilage. But, there are few types of bacteria that might survive in limited oxygen environments such as misteria monocytogenes and botulism. They can make food items extremely dangerous to eat. However, if people follow safe food vacuum sealing methods, they can reduce the chances of bacterial growth.