WORLD Trade Organization members agreed on Wednesday to start formal negotiations on a plan to boost COVID-19 vaccine supply to developing countries, but face rival proposals - one with and one without a waiver of intellectual property rights. South Africa and India, backed by many emerging nations, have been pushing for eight months for a temporary waiver of IP rights on vaccines and other treatments. This could allow local manufacturers to produce the shots, something the proponents say is essential to redress "staggering" inequity of supply. Developed nations, many home to large pharmaceutical companies, have resisted, arguing that a waiver…