Communicable and Non-communicable Infectious Diseases

A communicable disease has been spread through a variety of ways that include: contact with blood and bodily fluids; breathing in an airborne virus; or by being bitten by an insect from one person to the other person. Non-communicable diseases (NCDs) are mainly caused by genetic or lifestyle factors. The role of the immune system in disease is illustrated with examples of autoimmune and inflammatory conditions.