Less than 4% of Brazil's population has been vaccinated, and now a dangerous new variant has overwhelmed parts of the country's health care system.
Duke University's Miguel Nicolelis tells NPR what it's like in Sao Paulo, where hospitals are turning patients away.
Other countries are also struggling to contain the coronavirus, combat disinformation, and distribute vaccines. NPR international correspondents survey the obstacles: Diaa Hadid in Islamabad, Ruth Sherlock in Beirut and Julie McCarthy, who covers the Philippines.