The world now has its first ever pandemic treaty. Will it make a difference?

World Health Organization Director-General Tedros Adhanom Ghebreyesus addresses the World Health Assembly in Geneva on May 19. After the pandemic treaty was approved, he said, "The world is safer today thanks to the leadership, collaboration and commitment of our Member States to adopt the historic WHO Pandemic Agreement."

At the World Health Assembly, 193 members nations voted to adopt a treat calling for better preventive measures and global cooperation. But there are still details to hash out.

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