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.
But the media made them short so they could backfill Gen-X until it had an 18-to-20-year range, and add more kids to Gen-Y as they were born. The first Gen-X cohort of the 90s stopped in 1973, and Gen-Y began in 1974, ending in MAYBE 1990 at most. Thatâs all changed today.