The project is focused on the development of formulations, in the form of semi-operation, enabling different applications of phages and ensuring the maintenance of their highest lytic activity and maximum stability. It also aims to use the developed formulation – an aerosol for the preparation of a medical device-nasal spray used to prevent infections caused by MRSA. At the same time, the technology of the method of conservation of phages into individual formulations will represent a proven technology.