Immunity
the state of protection against foreign pathogens or substances (antigens)
Immunity is the ability of an organism to resist infection or disease through the actions of specialized cells and molecules in the immune system. The immune system is composed of various organs, cells, and proteins that work together to identify and destroy pathogens (such as viruses, bacteria, and other microorganisms) that invade the body.
There are two types of immunity: innate immunity and adaptive immunity. Innate immunity is the first line of defense, consisting of physical barriers (such as skin), cells (such as white blood cells), and proteins (such as complement) that can recognize and destroy a wide range of pathogens. Adaptive immunity, on the other hand, is a more specific and targeted response that develops over time in response to exposure to a particular pathogen. This involves the production of antibodies and specialized immune cells that can specifically target and neutralize the pathogen.
There are several factors that contribute to our immune system’s effectiveness, including genetics, age, lifestyle factors (such as diet and exercise), and exposure to pathogens. Some medical conditions, such as autoimmune diseases or HIV, can weaken the immune system and make individuals more susceptible to infections.
To maintain a healthy immune system, it is important to have a balanced and varied diet, engage in regular physical activity, get enough rest and sleep, manage stress, limit alcohol intake, and avoid smoking. Vaccination is also an important way to boost immunity by providing the body with a harmless form of a pathogen, allowing it to build immunity to that pathogen without getting sick.
More Answers:
Understanding cell-mediated immunity and its role in the body’s defense system.Understanding the Importance of Humoral Immunity in Preventing Infections & Maintaining Health
Understanding Herd Immunity and Its Importance in Public Health.