Updated 5:29 a.m. ET, May 17, 2020
- The numbers: More than 4.6 million cases of Covid-19 have been recorded worldwide, including at least 311,000 deaths.
- US warning: Without better planning, the US risks its "darkest winter in modern history," ousted vaccine expert Dr. Rick Bright testified before Congress.
- Brazil overtakes Spain: The South American country is now the fourth-worst hit in the world, with more than 233,500 cases.
- China quarantine: At least 8,000 people have been quarantined in northeast China as authorities battle a new outbreak. A top Chinese health official told CNN that avoiding a new wave of cases remains a "big challenge" for the country.