What Causes a Weak Immune System?

By analyzing those stem cells, “what's clear is that the immune system is fundamentally changed after a severe infection like COVID-19,” he says

Immune response, like that caused by a viral infection, can affect sleep At the same time, consistent sleep strengthens the immune system,

excretory system 70% of the immune system is located in the gut, where diverse bacteria is best

skeletal system We tend to take our immune systems for granted But they work hard to keep us healthy This complex system of cells is the body's primary defense system,