Hello friend thanks for the comment, here in Venezuela the vaccination schedule was scheduled as follows, Sputnik (Russia) for over 70 years - 2 doses - Sinophain (China) for the rest of the population - 2 doses - and the Jhonson & Jhonsons (Belgium) that has not arrived in the country was intended for the youngest, I think it is the only one that can be placed from 12 years of age. Remember to stay alive.