By Andrea Shalal WASHINGTON (Reuters) – Doctors without Borders, Oxfam America, Amnesty International and other top civil society groups on Wednesday urged U.S. President Joe Biden to reject a potential deal on COVID-19 vaccine intellectual property rights at the World Trade Organization. In a letter, the groups called the proposal a “rehash” of a European Union position that fell far short of the rights waiver Biden backed in May 2021 to speed vaccines to developing countries. “This leaked text … would impose new conditions limiting the existing WTO rules that now allow countries to issue c…