MSD is a global healthcare leader working to address unmet health needs. We provide innovative medicines, vaccines, biologic therapies and animal health products to help improve health and well-being. We work with customers in 140 countries to deliver broad-based healthcare solutions. The company is known as Merck in the United States and Canada. In New Zealand and everywhere else, we are known as MSD.
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Merck is committed to providing high-quality medical information to patients and healthcare providers. That's why we proudly offer The Merck Manuals free online.