Protective masks are devices worn over the nose and mouth to help prevent the spread of germs and protect against airborne particles. They are commonly used in healthcare settings, especially during outbreaks of infectious diseases like COVID-19. Masks can be made from various materials, including cloth, paper, and medical-grade materials, each offering different levels of protection. Wearing a protective mask is an important public health measure. It helps reduce the transmission of viruses and bacteria, especially in crowded or enclosed spaces. Proper usage includes covering both the nose and mouth, and masks should be disposed of or washed regularly to maintain their effectiveness.