immuniteettia

Immuniteetti is a Finnish word that translates to "immunity" in English. It refers to the body's natural defense system against pathogens, such as bacteria, viruses, and other disease-causing agents. This complex system involves a variety of cells, tissues, and organs that work together to protect the body from infection and disease.

There are two main types of immunity: innate immunity and adaptive immunity. Innate immunity is the body's first line of defense and is present from birth. It includes physical barriers like the skin and mucous membranes, as well as cellular components like phagocytes and natural killer cells. Adaptive immunity, on the other hand, is acquired over time and is specific to particular pathogens. It involves the production of antibodies and the development of memory cells, which allow the body to respond more effectively to future exposures.

Vaccination is a common method used to stimulate adaptive immunity. Vaccines introduce weakened or inactivated forms of pathogens, or parts of them, into the body. This triggers an immune response without causing illness, and the body develops immunity to the disease. Immuniteetti is crucial for maintaining health and preventing illness.