American Sign Language (ASL) is a natural language that serves as the predominant sign language of Deaf communities in the United States and most of anglophone Canada.
Adaptive immunity refers to antigen-specific immune response. The adaptive immune response is more complex than the innate. The antigen first must be processed and recognized. Once an antigen has been recognized, the adaptive immune system creates an army of immune cells specifically designed to attack that antigen.
The acquired response is called adaptive because it prepares the body's immune system for future challenges (though it can actually also be maladaptive when it results in autoimmunity).ometimes the adaptive system is unable to distinguish foreign molecules, the effects of this may be hayfever, asthma or any other allergies. Antigens are any substances that elicit the adaptive immune response.