Immuuntuit

Immuuntuit, also known as *immunity to infection*, refers to the body's ability to resist or neutralize pathogens such as bacteria, viruses, fungi, and parasites. This defense mechanism is primarily mediated by the immune system, which consists of various cells, tissues, and organs working together to protect the body from harmful invaders.

The immune system can be divided into two main components: innate immunity and adaptive immunity. Innate immunity is the first line of defense and provides immediate, non-specific protection against pathogens. It includes physical barriers like the skin and mucous membranes, as well as cellular components such as macrophages, neutrophils, and natural killer (NK) cells. Adaptive immunity, on the other hand, is specific to particular pathogens and develops over time following exposure. It involves B cells (which produce antibodies) and T cells (which target infected or abnormal cells).

Immunity can be acquired naturally through infection or artificially through vaccination. Natural immunity develops after recovering from a disease, while artificial immunity is induced by vaccines, which contain weakened or inactivated pathogens to stimulate a protective immune response without causing illness. Some individuals may have reduced immunity due to factors such as age, chronic illness, or immunosuppressive treatments, making them more susceptible to infections.

Immuuntuit can also refer to the concept of herd immunity, where a sufficient proportion of a population becomes immune to an infectious disease, either through vaccination or prior infection, reducing the likelihood of outbreaks. This protects vulnerable individuals who cannot develop immunity due to medical reasons. Understanding and maintaining robust immunity is essential for public health, particularly in preventing the spread of contagious diseases.