GlaxoSmithKline Plc is a global healthcare company which engages in developing, manufacturing, and marketing of pharmaceutical products including vaccines, over the counter medicines and health-related consumer products. It operates through the following segments: Pharmaceuticals, Pharmaceuticals R&D, Vaccines and Consumer Healthcare. The Pharmaceuticals segment researches, develops and makes available medicines that treat a variety of serious and chronic diseases. The Vaccines segment produces pediatric and adult vaccines to prevent a range of infectious diseases including, hepatitis A and B, diphtheria, tetanus and whooping cough, measles, mumps and rubella, polio, typhoid, influenza and bacterial meningitis. The Consumer Healthcare segment markets a range of consumer health products based on scientific innovation. The company was founded on December 6, 1999 and is headquartered in Brentford, the United Kingdom.