The inventors of Corbevax said it was cheap, easy to make, effective and safe. They hoped it could bring vaccine equity to countries that can't access costlier shots. Has it lived up to its promise?

Jeremy Konyndyk, executive director of USAID's COVID task force, shares his perspective on the U.S.' efforts to donate and distribute vaccines to low-income nations.

Three doctors present their proposal to get vaccines to everyone in the world. "We already have the resources, knowledge and systems," they write. Global leaders just have to make it happen.

The program called COVAX was set up to make sure that all countries have access to COVID vaccines. Two key public health figures talk about what went wrong — and how to fix it.

A small number of health workers are protesting for global vaccine equity. Their demonstrations echo the call for equal distribution of HIV medications decades ago — but there are key differences.