Merck & Co., Inc. provides healthcare solutions worldwide. It operates in four segments: Pharmaceutical, Animal Health, Healthcare Services, and Alliances. The company 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. It also provides neuromuscular blocking agents; anti-bacterial products; cholesterol modifying medicines; and vaginal contraceptive products. In addition, the company offers products to prevent chemotherapy-induced and post-operative nausea and vomiting; treat brain tumors, and metastatic non-small-cell lung cancer; prevent diseases caused by human papillomavirus; and vaccines for measles, mumps, rubella, varicella, shingles, rotavirus gastroenteritis, and pneumococcal diseases. Further, it offers antibiotic and anti-inflammatory drugs to treat infectious and respiratory diseases, fertility disorders, and pneumonia in cattle, horses, and swine; vaccines for poultry; parasiticide for sea lice in salmon; and antibiotics and vaccines for fishes. The company also provides companion animal products, such as ointments; diabetes mellitus; anthelmintic products; fluralaner products to treat fleas and ticks in dogs; and products for protection against bites from fleas, ticks, mosquitoes, and sandflies. Merck & Co., Inc. has collaborations with Pfizer Inc., AstraZeneca PLC, Bayer AG, Eisai Co., Ltd., IO Biotech, Premier Inc., Cue Biopharma, Inc., Foundation Medicine, Inc., Daiichi Sankyo Company, Limited, and Cold Genesys, Inc. It serves drug wholesalers and retailers, hospitals, government agencies and entities, physicians, physician distributors, veterinarians, distributors, animal producers, and managed health care providers. The company was founded in 1891 and is headquartered in Kenilworth, New Jersey.