President Joe Biden has given the initial nod for the U.S. to waive patent rights on COVID vaccines to boost international production. But there are real questions over how effective these moves would be, what other countries feel about it, and when this would translate into action. William Brangham discusses the matter with Rachel Silverman, a policy fellow at the Center for Global Development. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders