Doctors Without Borders Implores US, EU to Stop Blocking Vaccine Patent Waiver A Kenyan woman receives the first injection of the Oxford/AstraZeneca COVID-19 vaccine during the launch of the vaccination campaign for 5000 frontline workers in the tourism and hospitality sector in Nairobi County at the Kenyatta International Convention Centre in Nairobi, Kenya, on April 21, 2021. YASUYOSHI CHIBA / AFP via Getty Images By The international humanitarian group Doctors Without Borders on Wednesday implored the United States, European Union member nations, and other rich countries to immediately end their opposition to South Africa and India’s patent waiver proposal, which would enable the mass production of generic coronavirus vaccines to meet the developing world’s dire needs.