A Trump administration spokesman says Washington will continue to engage the rest of the world in vaccine development but won't be "constrained" by the "corrupt" World Health Organization.
According to Johns Hopkins University, more than 20 million people worldwide have tested positive for the virus. The milestone comes almost exactly five months after the WHO declared it a pandemic.
"How is it difficult for humans to unite and fight a common enemy that is killing people indiscriminately?" WHO Director-General Tedros Adhanom Ghebreyesus asks.
The organization at the eye of the coronavirus pandemic is taking heat from U.S. critics. Here's a look at its history, its mission and its role in the current crisis.
The new leader, Tedros Adhanom Ghebreyesus of Ethiopia, will be expected to reform the bureaucratic agency and deal with the world's growing health problems.