World leaders must “behave” if they want to avoid a wave of new fatalities related to the coronavirus pandemic, the World Health Organization’s top official said in response to President Trump’s criticism of his performance.

“We will have many body bags in front of us if we don’t behave,” WHO Director-General Tedros Adhanom Ghebreyesus told reporters Wednesday when asked to address Trump’s specific criticisms of the WHO. “When there are cracks at national level and global level, that’s when the virus succeeds. For God’s sake, we have lost more than 60,000 citizens of the world.”