Autoimmune disease They occur when a specific adaptive immune response is mounted against self antigens. The normal consequence of an adaptive immune response against a foreign antigen is the clearance of the antigen from the body. Virus-infected cells, for example, …Read more
Viruses gain access to the host through skin and mucous membranes, and via the respiratory, gastrointestinal, and genital tracts. Their virulence or lack of it may be determined by very small mutations in the genome. Viral infection of cells may …Read more
Disease prevention is a procedure through which individuals, those with risk factors for a disease or without the risk factors, are treated in order to prevent a disease from occurring. Treatment normally begins either before signs and symptoms of the …Read more