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.
Generation Z: Those born 1995-2009, they are the first generation never to have experienced the pre-internet world. Accordingly are already technology-focused. The iPad generation? Generation Alpha: Yes, now we're onto the Greek alphabet. This generation begins with those born in 2010.