When Germs or pathogens attack our body, our immune system starts working and releases proteins to fight with an infection. These kind of proteins are called antibodies. If the infected person produces the sufficient amount of protein then they will be recovered by antibodies itself.
In this plasma therapy, such immunity can be transferred from a healthy person to sick with the help of blood plasma. The plasma is a liquid part of the blood from the recovered patients of COVID-19. It provides a medium for red blood cells, white blood cells and platelets to circulate through the body. This kind of therapy involves transfusing certain components from the blood of people who have recovered into person who are very sick with the virus.