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.
Goku says he's 12 at the 21st tournament in May of 750, so apparently he considers his birthday to be after May, and presumably it would be the day he was found by Gohan. He might really be 13 but he says he's 12 so that's what we go with. At the end of Dragon Ball in year 756 he is 18, nearly 19. Raditz arrives near the end of the year 761, Goku is 24. The battle with Freeza is Christmas day 762. Goku would be 25 but he was dead for a year so he's still 24. The Cell Games happen in May 767. Goku is 29, nearly 30, by the calendar. His time in the RoSaT pretty much cancels out his time spent dead so he's now the correct age again.