The world has “been humbled by this very small microbe,” World Health Organization Director-General Tedros Adhanom Ghebreyesus said to the 73rd World Health Assembly on Monday. World Health Assembly on Monday.

“If this virus is teaching us anything, it’s humility,” he said.

“Six months ago, it would have been inconceivable to most that the world’s biggest cities would fall,” Tedros added. “That shops, restaurants, schools and workplaces would be closed. That global travel would grind to a standstill. That simply shaking hands could be life threatening.”

He urged officials to “treat this virus with the respect and attention it deserves,” nothing that millions of cases have been reported around the world.

“But numbers don’t even begin to tell the story of this virus, each loss of life leaves a scar for families, communities and nations.”