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Merck is a healthcare manufacturer and distributor of pharmaceuticals. The Company operates in four segments: Pharmaceutical, Animal Health, Healthcare Services, and Alliances. Merck offers therapeutic and preventive agents to treat cardiovascular diseases, type 2 diabetes, asthma, nasal allergy symptoms, allergic rhinitis, chronic hepatitis C virus, HIV-1 infection, fungal, intra-abdominal infections, hypertension, arthritis and pain, inflammatory, osteoporosis, and fertility diseases.