The Sabin Vaccine is a vaccine that was developed by Dr. Albert Sabin to protect against the poliovirus. It is also known as the Oral Polio Vaccine (OPV) and is one of the two vaccines used against polio, the other being the Inactivated Polio Vaccine (IPV). The Sabin Vaccine is a live, attenuated vaccine that is given orally. It contains weakened strains of the poliovirus that stimulate an immune response without causing illness. Other synonyms for the Sabin Vaccine include the Polio Drops, the Live Attenuated Oral Polio Vaccine (LAV), and the Trivalent Oral Polio Vaccine (TOPV). The use of the Sabin Vaccine has been instrumental in the worldwide campaign to eradicate polio.