Yervoy is a medication used to treat advanced melanoma, a type of skin cancer. According to the official website of Bristol-Myers Squibb, the manufacturer of Yervoy, they offer a program called "BMS Access Support" that provides financial assistance to eligible patients who need help paying for their medication [3]. However, it is not clear from the sources provided whether this program is available worldwide.

The first source, Drug Patent Watch, provides information about the patent status and expiration dates of Yervoy in various countries [1]. This information is useful for understanding when generic versions of the medication may become available in different parts of the world, but it does not address the availability of the BMS Access Support program.

The second source, a report from the U.S. Department of Health and Human Services, compares the prices of top spending Part B drugs in the United States with prices in other countries [2]. While this report provides valuable information about the cost of Yervoy in different countries, it does not mention the BMS Access Support program.

Therefore, based on the sources provided, it is unclear whether the BMS Access Support program for Yervoy is available worldwide. Patients outside the United States who are interested in accessing financial assistance for this medication should contact Bristol-Myers Squibb or their local healthcare provider for more information.

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/YERVOY
[2] https://aspe.hhs.gov/sites/default/files/private/pdf/259996/ComparisonUSInternationalPricesTopSpendingPartBDrugs.pdf
[3] https://www.bms.com/patient-and-caregivers/get-help-paying-for-your-medicines.html