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One proposal to improve global vaccine distribution is to waive the patent restrictions on Covid vaccines and medicines. But even if the patents are waived, it would take months, if not years, to replicate Pfizer's complex supply chain. One shot needs needs 280 components, from 86 suppliers, from 19 countries. The Biden Administration is undecided on whether the US will support the loosening of patents. Tomorrow the WTO meets to discuss it, and the EU and UK have said they'll oppose it. Critics say it's a red herring that will not solve the supply chain delays. The Â鶹¹ÙÍøÊ×Ò³Èë¿Ú is joined by Dr Anne Moore, a biochemist at University College Cork who's worked as a scientist developing vaccines, to discuss.