Merck is a global pharmaceutical company that developed many important drugs and vaccines. It faces issues in pricing policies, patents, and expanding access to medicine in developing countries with poor infrastructure and low incomes. Merck addresses these issues through initiatives like ACHAP in Botswana and Accelerating Access Initiative that provide HIV medicines at discounted prices. It also has a differential pricing policy that sets prices based on a country's development level and disease burden. Merck works to improve access while maintaining incentives for drug innovation through partnerships and tailored pricing strategies.