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
His Name Is Alive on their first full North American tour with Defever on guitar, Karin Oliver on vocals, and Trey Many on drums. This album and tour showed a different side of HNIA to their fans, marking the first time Defever had full control of the mixing and assembly of a HNIA release. "Mouth by Mouth" was a more ambitious noisy pop record that lacked some of the earlier sparse gothic sounds people came to expect from the first two releases. Defever's wide musical taste became more apparent as "Mouth by Mouth" showcased his love for obscure '60s pop, reggae, Japanese noise and