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Butang is a recombinant hepatitis B vaccine manufactured by Instituto Butantan in Brazil. It is a yeast-derived recombinant protein adsorbed to an aluminum-containing immunostimulant. The vaccine works by inducing an immune response, specifically the production of anti-HBs antibodies, to protect against Hepatitis B virus infection. It is widely used in Brazil and has been evaluated for safety and immunogenicity across various age groups, including neonates, children, adolescents, and adults.
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