What is an antigen? Antigen refers to any foreign substance which on entering the body  stimulates the production of antibodies in the body of the  individual as a part of the immune response.
Gen Z Defined. Gen Z consumers range from ages 2 to 19, though the target range for marketers lies from ages 11 to 16. Gen Z is the most diverse and multicultural of any generation in the U.S. -- 55% are Caucasian, 24% are Hispanic, 14% are African-American and 4% are Asian. Gen Z Beliefs.
For now, letâs look at ten things you should know about Gen Z. 1  They will be the largest generation in history. 2  The majority of this generation is non-white. 3  Hispanics are the fastest-growing group in Gen Z. 4  At least one of ten of this generation will marry across ethnic and racial lines. 5  Homosexual marriage will be embraced as normative.