There are different types of masks, fabric ones, surgical ones those referred to by the acronyms FFP2 and FFP3, which differ in various characteristics related to composition, ability to act as a barrier to the virus, durability and other details, but all of them perform both passive and active defense functions, that is, they protect the wearer but also the people around from infection.
Dyspepsia, a digestive disorder
Dyspepsia, a disorder that impairs digestion and generates discomfort in those affected after every meal.