Polio vaccine is usually provided in vials containing 10–20 doses of vaccine. A single dose of oral polio vaccine (usually two drops) contains 1,000,000 infectious units of Sabin 1 (effective against PV1), 100,000 infectious units of the Sabin 2 strain, and 600,000 infectious units of Sabin 3. The vaccine contains small traces of antibiotics—neomycin and streptomycin—but does not contain preservatives. In a generic sense, vaccination works by priming the immune system with an 'immunogen'. Stimulating immune response, by use of an infectious agent, is known as immunization. The development of immunity to polio efficiently blocks person-to-person transmission of wild poliovirus, thereby protecting
Brian Hanley (microbiologist) Brian Hanley (microbiologist) Brian Hanley (born c. 1957) is an American microbiologist and founder of Butterfly Sciences. He is known for using an experimental gene therapy to try to improve health span, and is the first subject in the study. Hanley was 60 years old as of February 2017 and holds a PhD in Microbiology from University of California, Davis. In 2009 he founded Butterfly Sciences in Davis, California to develop a gene therapy to treat HIV AIDS using a combination of GHRH and an intracellular vaccine. He has numerous articles and blog posts, and academic publications in epidemiology, biotechnology,