“I do believe that the US is obligated to share vaccines with other countries,” said Keisha Ray, an assistant professor and bioethicist at UTHealth McGovern Medical School in Houston, “especially those countries we might consider poorer countries or what we call underdeveloped countries.” “But certainly there could be a point where there are people who will not take the vaccine and we have extra vaccine in this country, in which case it should be used and shared.” “At the current rate vaccines are being administered, 92 of the world’s poorest countries won’t vaccinate 60% of their populations until 2023 or later.”