Option 1 - BCG: BCG stands for Bacillus Calmette-Gu鲩n, which is a vaccine used to prevent tuberculosis (TB). It is a live attenuated vaccine and is given to newborns in many countries.

Option 2 - Anti-rabies: Anti-rabies is not a vaccine, but a type of treatment given after exposure to the rabies virus. It consists of injections of rabies immune globulin and a series of rabies vaccine doses.

Option 3 - Polio vaccine: Polio vaccine is a vaccine used to prevent polio, a highly infectious disease caused by the poliovirus. It is given in multiple doses and has been successful in reducing the number of polio cases globally.

Option 4 - Progesterone: Progesterone is not a vaccine. It is a hormone that plays a crucial role in the female reproductive system, particularly in maintaining pregnancy and regulating the menstrual cycle.

Therefore, the correct answer is option 4 - Progesterone, as it is not a vaccine.