Environmental pathogens are all around us. For a healthy body, this isn't much of a threat. Our immune systems step in and protect us against them. However, for a person with a weakened immune system, pathogens can cause serious infection.
Environmental pathogens are all around us. For a healthy body, this isn't much of a threat. Our immune systems step in and protect us against them. However, for a person with a weakened immune system, pathogens can cause serious infection.